Prepping to modernize the Javascript version.
This commit is contained in:
parent
3c07f12fe2
commit
1667a0e94d
1154
backbone.js
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backbone.js
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@ -1,6 +1,6 @@
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[
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[
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{
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{
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"id": "unless",
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"id": "unless-you-have-been-drinking",
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"title": "Unless You Have Been Drinking",
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"title": "Unless You Have Been Drinking",
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"artist": "Adventures in Odyssey",
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"artist": "Adventures in Odyssey",
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"image": "images/AdventuresInOdyssey_t.jpg",
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"image": "images/AdventuresInOdyssey_t.jpg",
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@ -9,7 +9,7 @@
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"url": "http://www.amazon.com/Door-Religious-Knives/dp/B001FGW0UQ/?tag=quirkey-20"
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"url": "http://www.amazon.com/Door-Religious-Knives/dp/B001FGW0UQ/?tag=quirkey-20"
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},
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},
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{
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{
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"id": "utmost",
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"id": "leave-to-do-my-utmost",
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"title": "Leave To Do My Utmost",
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"title": "Leave To Do My Utmost",
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"artist": "American Attorneys",
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"artist": "American Attorneys",
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"image": "images/AmericanAttorneys_t.jpg",
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"image": "images/AmericanAttorneys_t.jpg",
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@ -18,7 +18,7 @@
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"url": "http://www.amazon.com/gp/product/B002GNOMJE?ie=UTF8&tag=quirkeycom-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B002GNOMJE"
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"url": "http://www.amazon.com/gp/product/B002GNOMJE?ie=UTF8&tag=quirkeycom-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B002GNOMJE"
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},
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},
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{
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{
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"id": "encircled",
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"id": "the-dead-sleep-encircled-by-the-living",
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"title": "The Dead Sleep Encircled by The Living",
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"title": "The Dead Sleep Encircled by The Living",
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"artist": "British Civil Light Transport",
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"artist": "British Civil Light Transport",
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"image": "images/BritishCivilLightTransport_t.jpg",
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"image": "images/BritishCivilLightTransport_t.jpg",
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@ -27,7 +27,7 @@
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"url": "http://www.amazon.com/Bitte-Orca-Dirty-Projectors/dp/B0026T4RTI/ref=pd_sim_m_12?tag=quirkey-20"
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"url": "http://www.amazon.com/Bitte-Orca-Dirty-Projectors/dp/B0026T4RTI/ref=pd_sim_m_12?tag=quirkey-20"
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},
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},
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{
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{
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"id": "assimilation",
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"id": "periods-of-mental-assimilation",
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"title": "Periods of Mental Assimilation",
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"title": "Periods of Mental Assimilation",
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"artist": "Grigory Szondy",
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"artist": "Grigory Szondy",
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"image": "images/PeriodsofMentalAssimilation_t.jpg",
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"image": "images/PeriodsofMentalAssimilation_t.jpg",
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@ -36,7 +36,7 @@
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"url": "http://www.amazon.com/Pains-Being-Pure-Heart/dp/B001LGXIDS/ref=pd_sim_m_44?tag=quirkey-20"
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"url": "http://www.amazon.com/Pains-Being-Pure-Heart/dp/B001LGXIDS/ref=pd_sim_m_44?tag=quirkey-20"
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},
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},
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{
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{
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"id": "bankruptcy",
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"id": "keenly-developed-moral-bankruptcy",
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"title": "Keenly Developed Moral Bankruptcy",
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"title": "Keenly Developed Moral Bankruptcy",
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"artist": "Stealth Monkey Virus",
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"artist": "Stealth Monkey Virus",
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"image": "images/StealthMonkeyVirus_t.jpg",
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"image": "images/StealthMonkeyVirus_t.jpg",
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@ -45,7 +45,7 @@
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"url": "http://www.amazon.com/Pains-Being-Pure-Heart/dp/B001LGXIDS/ref=pd_sim_m_44?tag=quirkey-20"
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"url": "http://www.amazon.com/Pains-Being-Pure-Heart/dp/B001LGXIDS/ref=pd_sim_m_44?tag=quirkey-20"
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},
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},
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{
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{
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"id": "sparrow",
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"id": "my-mistresss-sparrow-is-dead",
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"title": "My Mistress's Sparrow is Dead",
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"title": "My Mistress's Sparrow is Dead",
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"artist": "Sums of Mongolia",
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"artist": "Sums of Mongolia",
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"image": "images/SumsofMagnolia_t.jpg",
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"image": "images/SumsofMagnolia_t.jpg",
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Before Width: | Height: | Size: 75 KiB After Width: | Height: | Size: 75 KiB |
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Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 22 KiB |
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Before Width: | Height: | Size: 77 KiB After Width: | Height: | Size: 77 KiB |
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Before Width: | Height: | Size: 19 KiB After Width: | Height: | Size: 19 KiB |
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Before Width: | Height: | Size: 62 KiB After Width: | Height: | Size: 62 KiB |
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Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
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Before Width: | Height: | Size: 47 KiB After Width: | Height: | Size: 47 KiB |
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Before Width: | Height: | Size: 7.1 KiB After Width: | Height: | Size: 7.1 KiB |
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Before Width: | Height: | Size: 56 KiB After Width: | Height: | Size: 56 KiB |
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Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
75
index.html
75
index.html
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<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>
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The Backbone Store
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</title>
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<link rel="stylesheet" href="jsonstore.css" type="text/css">
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<script id="store_index_template" type="text/x-underscore-tmplate">
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<h1>Product Catalog</h1>
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<ul>
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<% for(i=0,l=products.length;i<l;++i) { p = products[i]; %>
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<li class="item">
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<div class="item-image">
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<a href="#item/<%= p.id %>">
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<img alt="<%= p.title %>" src="<%= p.image %>" />
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</a>
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</div>
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<div class="item-artist"><%= p.artist %></div>
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<div class="item-title"><%= p.title %></div>
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<div class="item-price">$<%= p.price %></div>
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</li>
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<% } %>
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</ul>
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</script>
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<script id="store_item_template" type="text/x-underscore-template">
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<div class="item-detail">
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<div class="item-image">
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<img alt="<%= title %>" src="<%= large_image %>" />
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</div>
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</div>
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<div class="item-info">
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<div class="item-artist"><%= artist %></div>
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<div class="item-title"><%= title %></div>
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<div class="item-price">$<%= price %></div>
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<form action="#/cart" method="post">
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<p>
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<label>Quantity:</label>
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<input class="uqf" name="quantity" size="2" type="text" value="1" />
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</p>
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<p>
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<input class="uq" type="submit" value="Add to Cart" />
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</p>
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</form>
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<div class="item-link">
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<a href="<%= url %>">Buy this item on Amazon</a>
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</div>
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<div class="back-link">
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<a href="#">« Back to Items</a>
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</div>
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</div>
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</script>
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<script id="store_cart_template" type="text/x-underscore-template">
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<p>Items: <%= count %> ($<%= cost %>)</p>
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</script>
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</head>
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<body>
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<div id="container">
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<div id="header">
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<h1>
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The Backbone Store
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</h1>
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<div class="cart-info">
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</div>
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</div>
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<div id="main"> </div>
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</div>
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<script src="jquery-1.6.2.min.js" type="text/javascript"></script>
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<script src="underscore.js" type="text/javascript"></script>
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<script src="backbone.js" type="text/javascript"></script>
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<script src="store.js" type="text/javascript"></script>
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</body>
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</html>
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/******************************************************
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* json store *
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\*****************************************************/
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body {
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font-family: "Lucida Grande", Lucida, Helvetica, Arial, sans-serif;
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background: #FFF;
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color: #333;
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margin: 0px;
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padding: 0px;
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}
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#header {
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background: #C97E41;
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margin: 0px;
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padding: 20px;
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}
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#header h1 {
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font-family: Inconsolata, Monaco, Courier, mono;
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color: #FFF;
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margin: 0px;
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}
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#header .cart-info {
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position: absolute;
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top: 0px;
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right: 0px;
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text-align: right;
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padding: 10px;
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background: #714625;
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color: #FFF;
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font-size: 12px;
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font-weight: bold;
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}
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img {
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border: 0;
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}
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#productlistview ul {
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list-style: none;
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}
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.item {
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display: border;
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float:left;
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width: 250px;
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margin-right: 10px;
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margin-bottom: 10px;
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padding: 10px;
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border: 1px solid #ccc;
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text-align:center;
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font-size: 12px;
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}
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.item-title {
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font-weight: bold;
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}
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.item-artist {
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font-weight: bold;
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font-size: 14px;
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}
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.item-detail .item-image {
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float:left;
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}
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.item-detail .item-info {
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padding: 100px 10px 0px 10px;
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}
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211
store.js
211
store.js
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(function() {
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var Product = Backbone.Model.extend({})
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var ProductCollection = Backbone.Collection.extend({
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model: Product,
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initialize: function(models, options) {
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this.url = options.url;
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},
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comparator: function(item) {
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return item.get('title');
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}
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});
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var Item = Backbone.Model.extend({
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update: function(amount) {
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this.set({'quantity': amount}, {silent: true});
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this.collection.trigger('change', this);
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},
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price: function() {
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console.log(this.get('product').get('title'), this.get('quantity'));
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return this.get('product').get('price') * this.get('quantity');
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}
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});
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var ItemCollection = Backbone.Collection.extend({
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model: Item,
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getOrCreateItemForProduct: function(product) {
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var i,
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pid = product.get('id'),
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o = this.detect(function(obj) {
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return (obj.get('product').get('id') == pid);
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});
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if (o) {
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return o;
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}
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i = new Item({'product': product, 'quantity': 0})
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this.add(i, {silent: true})
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return i;
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},
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getTotalCount: function() {
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return this.reduce(function(memo, obj) {
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return obj.get('quantity') + memo; }, 0);
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},
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getTotalCost: function() {
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return this.reduce(function(memo, obj) {
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return obj.price() + memo; }, 0);
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}
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});
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var _BaseView = Backbone.View.extend({
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parent: $('#main'),
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className: 'viewport',
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initialize: function() {
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this.el = $(this.el);
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this.el.hide();
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this.parent.append(this.el);
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return this;
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},
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hide: function() {
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if (this.el.is(":visible") === false) {
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return null;
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}
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promise = $.Deferred(_.bind(function(dfd) {
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this.el.fadeOut('fast', dfd.resolve)}, this));
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return promise.promise();
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},
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show: function() {
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if (this.el.is(':visible')) {
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return;
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}
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promise = $.Deferred(_.bind(function(dfd) {
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this.el.fadeIn('fast', dfd.resolve) }, this))
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return promise.promise();
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}
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});
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var ProductListView = _BaseView.extend({
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id: 'productlistview',
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template: $("#store_index_template").html(),
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initialize: function(options) {
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this.constructor.__super__.initialize.apply(this, [options])
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this.collection.bind('reset', _.bind(this.render, this));
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},
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render: function() {
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this.el.html(_.template(this.template,
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{'products': this.collection.toJSON()}))
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return this;
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}
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});
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var ProductView = _BaseView.extend({
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id: 'productitemview',
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template: $("#store_item_template").html(),
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initialize: function(options) {
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this.constructor.__super__.initialize.apply(this, [options])
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this.itemcollection = options.itemcollection;
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this.item = this.itemcollection.getOrCreateItemForProduct(this.model);
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return this;
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},
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events: {
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"keypress .uqf" : "updateOnEnter",
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"click .uq" : "update",
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},
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update: function(e) {
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e.preventDefault();
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this.item.update(parseInt(this.$('.uqf').val()));
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},
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updateOnEnter: function(e) {
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if (e.keyCode == 13) {
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return this.update(e);
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}
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},
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render: function() {
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this.el.html(_.template(this.template, this.model.toJSON()));
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return this;
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}
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});
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var CartWidget = Backbone.View.extend({
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el: $('.cart-info'),
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template: $('#store_cart_template').html(),
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initialize: function() {
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this.collection.bind('change', _.bind(this.render, this));
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},
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render: function() {
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this.el.html(
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_.template(this.template, {
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'count': this.collection.getTotalCount(),
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'cost': this.collection.getTotalCost()
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})).animate({paddingTop: '30px'})
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.animate({paddingTop: '10px'});
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}
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});
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|
|
||||||
var BackboneStore = Backbone.Router.extend({
|
|
||||||
views: {},
|
|
||||||
products: null,
|
|
||||||
cart: null,
|
|
||||||
|
|
||||||
routes: {
|
|
||||||
"": "index",
|
|
||||||
"item/:id": "product",
|
|
||||||
},
|
|
||||||
|
|
||||||
initialize: function(data) {
|
|
||||||
this.cart = new ItemCollection();
|
|
||||||
new CartWidget({collection: this.cart});
|
|
||||||
|
|
||||||
this.products = new ProductCollection([], {
|
|
||||||
url: 'data/items.json'});
|
|
||||||
this.views = {
|
|
||||||
'_index': new ProductListView({
|
|
||||||
collection: this.products
|
|
||||||
})
|
|
||||||
};
|
|
||||||
$.when(this.products.fetch({reset: true}))
|
|
||||||
.then(function() { window.location.hash = ''; });
|
|
||||||
return this;
|
|
||||||
},
|
|
||||||
|
|
||||||
hideAllViews: function () {
|
|
||||||
return _.select(
|
|
||||||
_.map(this.views, function(v) { return v.hide(); }),
|
|
||||||
function (t) { return t != null });
|
|
||||||
},
|
|
||||||
|
|
||||||
index: function() {
|
|
||||||
var view = this.views['_index'];
|
|
||||||
$.when(this.hideAllViews()).then(
|
|
||||||
function() { return view.show(); });
|
|
||||||
},
|
|
||||||
|
|
||||||
product: function(id) {
|
|
||||||
var product, v, view;
|
|
||||||
product = this.products.detect(function(p) { return p.get('id') == (id); })
|
|
||||||
view = ((v = this.views)['item.' + id]) || (v['item.' + id] = (
|
|
||||||
new ProductView({model: product,
|
|
||||||
itemcollection: this.cart}).render()));
|
|
||||||
$.when(this.hideAllViews()).then(
|
|
||||||
function() { view.show(); });
|
|
||||||
}
|
|
||||||
});
|
|
||||||
|
|
||||||
$(document).ready(function() {
|
|
||||||
new BackboneStore();
|
|
||||||
Backbone.history.start();
|
|
||||||
});
|
|
||||||
|
|
||||||
}).call(this);
|
|
||||||
839
underscore.js
839
underscore.js
|
|
@ -1,839 +0,0 @@
|
||||||
// Underscore.js 1.1.7
|
|
||||||
// (c) 2011 Jeremy Ashkenas, DocumentCloud Inc.
|
|
||||||
// Underscore is freely distributable under the MIT license.
|
|
||||||
// Portions of Underscore are inspired or borrowed from Prototype,
|
|
||||||
// Oliver Steele's Functional, and John Resig's Micro-Templating.
|
|
||||||
// For all details and documentation:
|
|
||||||
// http://documentcloud.github.com/underscore
|
|
||||||
|
|
||||||
(function() {
|
|
||||||
|
|
||||||
// Baseline setup
|
|
||||||
// --------------
|
|
||||||
|
|
||||||
// Establish the root object, `window` in the browser, or `global` on the server.
|
|
||||||
var root = this;
|
|
||||||
|
|
||||||
// Save the previous value of the `_` variable.
|
|
||||||
var previousUnderscore = root._;
|
|
||||||
|
|
||||||
// Establish the object that gets returned to break out of a loop iteration.
|
|
||||||
var breaker = {};
|
|
||||||
|
|
||||||
// Save bytes in the minified (but not gzipped) version:
|
|
||||||
var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
|
|
||||||
|
|
||||||
// Create quick reference variables for speed access to core prototypes.
|
|
||||||
var slice = ArrayProto.slice,
|
|
||||||
unshift = ArrayProto.unshift,
|
|
||||||
toString = ObjProto.toString,
|
|
||||||
hasOwnProperty = ObjProto.hasOwnProperty;
|
|
||||||
|
|
||||||
// All **ECMAScript 5** native function implementations that we hope to use
|
|
||||||
// are declared here.
|
|
||||||
var
|
|
||||||
nativeForEach = ArrayProto.forEach,
|
|
||||||
nativeMap = ArrayProto.map,
|
|
||||||
nativeReduce = ArrayProto.reduce,
|
|
||||||
nativeReduceRight = ArrayProto.reduceRight,
|
|
||||||
nativeFilter = ArrayProto.filter,
|
|
||||||
nativeEvery = ArrayProto.every,
|
|
||||||
nativeSome = ArrayProto.some,
|
|
||||||
nativeIndexOf = ArrayProto.indexOf,
|
|
||||||
nativeLastIndexOf = ArrayProto.lastIndexOf,
|
|
||||||
nativeIsArray = Array.isArray,
|
|
||||||
nativeKeys = Object.keys,
|
|
||||||
nativeBind = FuncProto.bind;
|
|
||||||
|
|
||||||
// Create a safe reference to the Underscore object for use below.
|
|
||||||
var _ = function(obj) { return new wrapper(obj); };
|
|
||||||
|
|
||||||
// Export the Underscore object for **CommonJS**, with backwards-compatibility
|
|
||||||
// for the old `require()` API. If we're not in CommonJS, add `_` to the
|
|
||||||
// global object.
|
|
||||||
if (typeof module !== 'undefined' && module.exports) {
|
|
||||||
module.exports = _;
|
|
||||||
_._ = _;
|
|
||||||
} else {
|
|
||||||
// Exported as a string, for Closure Compiler "advanced" mode.
|
|
||||||
root['_'] = _;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Current version.
|
|
||||||
_.VERSION = '1.1.7';
|
|
||||||
|
|
||||||
// Collection Functions
|
|
||||||
// --------------------
|
|
||||||
|
|
||||||
// The cornerstone, an `each` implementation, aka `forEach`.
|
|
||||||
// Handles objects with the built-in `forEach`, arrays, and raw objects.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `forEach` if available.
|
|
||||||
var each = _.each = _.forEach = function(obj, iterator, context) {
|
|
||||||
if (obj == null) return;
|
|
||||||
if (nativeForEach && obj.forEach === nativeForEach) {
|
|
||||||
obj.forEach(iterator, context);
|
|
||||||
} else if (obj.length === +obj.length) {
|
|
||||||
for (var i = 0, l = obj.length; i < l; i++) {
|
|
||||||
if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return;
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
for (var key in obj) {
|
|
||||||
if (hasOwnProperty.call(obj, key)) {
|
|
||||||
if (iterator.call(context, obj[key], key, obj) === breaker) return;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return the results of applying the iterator to each element.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `map` if available.
|
|
||||||
_.map = function(obj, iterator, context) {
|
|
||||||
var results = [];
|
|
||||||
if (obj == null) return results;
|
|
||||||
if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
results[results.length] = iterator.call(context, value, index, list);
|
|
||||||
});
|
|
||||||
return results;
|
|
||||||
};
|
|
||||||
|
|
||||||
// **Reduce** builds up a single result from a list of values, aka `inject`,
|
|
||||||
// or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
|
|
||||||
_.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
|
|
||||||
var initial = memo !== void 0;
|
|
||||||
if (obj == null) obj = [];
|
|
||||||
if (nativeReduce && obj.reduce === nativeReduce) {
|
|
||||||
if (context) iterator = _.bind(iterator, context);
|
|
||||||
return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
|
|
||||||
}
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
if (!initial) {
|
|
||||||
memo = value;
|
|
||||||
initial = true;
|
|
||||||
} else {
|
|
||||||
memo = iterator.call(context, memo, value, index, list);
|
|
||||||
}
|
|
||||||
});
|
|
||||||
if (!initial) throw new TypeError("Reduce of empty array with no initial value");
|
|
||||||
return memo;
|
|
||||||
};
|
|
||||||
|
|
||||||
// The right-associative version of reduce, also known as `foldr`.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `reduceRight` if available.
|
|
||||||
_.reduceRight = _.foldr = function(obj, iterator, memo, context) {
|
|
||||||
if (obj == null) obj = [];
|
|
||||||
if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
|
|
||||||
if (context) iterator = _.bind(iterator, context);
|
|
||||||
return memo !== void 0 ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
|
|
||||||
}
|
|
||||||
var reversed = (_.isArray(obj) ? obj.slice() : _.toArray(obj)).reverse();
|
|
||||||
return _.reduce(reversed, iterator, memo, context);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return the first value which passes a truth test. Aliased as `detect`.
|
|
||||||
_.find = _.detect = function(obj, iterator, context) {
|
|
||||||
var result;
|
|
||||||
any(obj, function(value, index, list) {
|
|
||||||
if (iterator.call(context, value, index, list)) {
|
|
||||||
result = value;
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
});
|
|
||||||
return result;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return all the elements that pass a truth test.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `filter` if available.
|
|
||||||
// Aliased as `select`.
|
|
||||||
_.filter = _.select = function(obj, iterator, context) {
|
|
||||||
var results = [];
|
|
||||||
if (obj == null) return results;
|
|
||||||
if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
if (iterator.call(context, value, index, list)) results[results.length] = value;
|
|
||||||
});
|
|
||||||
return results;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return all the elements for which a truth test fails.
|
|
||||||
_.reject = function(obj, iterator, context) {
|
|
||||||
var results = [];
|
|
||||||
if (obj == null) return results;
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
if (!iterator.call(context, value, index, list)) results[results.length] = value;
|
|
||||||
});
|
|
||||||
return results;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Determine whether all of the elements match a truth test.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `every` if available.
|
|
||||||
// Aliased as `all`.
|
|
||||||
_.every = _.all = function(obj, iterator, context) {
|
|
||||||
var result = true;
|
|
||||||
if (obj == null) return result;
|
|
||||||
if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
if (!(result = result && iterator.call(context, value, index, list))) return breaker;
|
|
||||||
});
|
|
||||||
return result;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Determine if at least one element in the object matches a truth test.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `some` if available.
|
|
||||||
// Aliased as `any`.
|
|
||||||
var any = _.some = _.any = function(obj, iterator, context) {
|
|
||||||
iterator = iterator || _.identity;
|
|
||||||
var result = false;
|
|
||||||
if (obj == null) return result;
|
|
||||||
if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
if (result |= iterator.call(context, value, index, list)) return breaker;
|
|
||||||
});
|
|
||||||
return !!result;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Determine if a given value is included in the array or object using `===`.
|
|
||||||
// Aliased as `contains`.
|
|
||||||
_.include = _.contains = function(obj, target) {
|
|
||||||
var found = false;
|
|
||||||
if (obj == null) return found;
|
|
||||||
if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
|
|
||||||
any(obj, function(value) {
|
|
||||||
if (found = value === target) return true;
|
|
||||||
});
|
|
||||||
return found;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Invoke a method (with arguments) on every item in a collection.
|
|
||||||
_.invoke = function(obj, method) {
|
|
||||||
var args = slice.call(arguments, 2);
|
|
||||||
return _.map(obj, function(value) {
|
|
||||||
return (method.call ? method || value : value[method]).apply(value, args);
|
|
||||||
});
|
|
||||||
};
|
|
||||||
|
|
||||||
// Convenience version of a common use case of `map`: fetching a property.
|
|
||||||
_.pluck = function(obj, key) {
|
|
||||||
return _.map(obj, function(value){ return value[key]; });
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return the maximum element or (element-based computation).
|
|
||||||
_.max = function(obj, iterator, context) {
|
|
||||||
if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
|
|
||||||
var result = {computed : -Infinity};
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
var computed = iterator ? iterator.call(context, value, index, list) : value;
|
|
||||||
computed >= result.computed && (result = {value : value, computed : computed});
|
|
||||||
});
|
|
||||||
return result.value;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return the minimum element (or element-based computation).
|
|
||||||
_.min = function(obj, iterator, context) {
|
|
||||||
if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj);
|
|
||||||
var result = {computed : Infinity};
|
|
||||||
each(obj, function(value, index, list) {
|
|
||||||
var computed = iterator ? iterator.call(context, value, index, list) : value;
|
|
||||||
computed < result.computed && (result = {value : value, computed : computed});
|
|
||||||
});
|
|
||||||
return result.value;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Sort the object's values by a criterion produced by an iterator.
|
|
||||||
_.sortBy = function(obj, iterator, context) {
|
|
||||||
return _.pluck(_.map(obj, function(value, index, list) {
|
|
||||||
return {
|
|
||||||
value : value,
|
|
||||||
criteria : iterator.call(context, value, index, list)
|
|
||||||
};
|
|
||||||
}).sort(function(left, right) {
|
|
||||||
var a = left.criteria, b = right.criteria;
|
|
||||||
return a < b ? -1 : a > b ? 1 : 0;
|
|
||||||
}), 'value');
|
|
||||||
};
|
|
||||||
|
|
||||||
// Groups the object's values by a criterion produced by an iterator
|
|
||||||
_.groupBy = function(obj, iterator) {
|
|
||||||
var result = {};
|
|
||||||
each(obj, function(value, index) {
|
|
||||||
var key = iterator(value, index);
|
|
||||||
(result[key] || (result[key] = [])).push(value);
|
|
||||||
});
|
|
||||||
return result;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Use a comparator function to figure out at what index an object should
|
|
||||||
// be inserted so as to maintain order. Uses binary search.
|
|
||||||
_.sortedIndex = function(array, obj, iterator) {
|
|
||||||
iterator || (iterator = _.identity);
|
|
||||||
var low = 0, high = array.length;
|
|
||||||
while (low < high) {
|
|
||||||
var mid = (low + high) >> 1;
|
|
||||||
iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid;
|
|
||||||
}
|
|
||||||
return low;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Safely convert anything iterable into a real, live array.
|
|
||||||
_.toArray = function(iterable) {
|
|
||||||
if (!iterable) return [];
|
|
||||||
if (iterable.toArray) return iterable.toArray();
|
|
||||||
if (_.isArray(iterable)) return slice.call(iterable);
|
|
||||||
if (_.isArguments(iterable)) return slice.call(iterable);
|
|
||||||
return _.values(iterable);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return the number of elements in an object.
|
|
||||||
_.size = function(obj) {
|
|
||||||
return _.toArray(obj).length;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Array Functions
|
|
||||||
// ---------------
|
|
||||||
|
|
||||||
// Get the first element of an array. Passing **n** will return the first N
|
|
||||||
// values in the array. Aliased as `head`. The **guard** check allows it to work
|
|
||||||
// with `_.map`.
|
|
||||||
_.first = _.head = function(array, n, guard) {
|
|
||||||
return (n != null) && !guard ? slice.call(array, 0, n) : array[0];
|
|
||||||
};
|
|
||||||
|
|
||||||
// Returns everything but the first entry of the array. Aliased as `tail`.
|
|
||||||
// Especially useful on the arguments object. Passing an **index** will return
|
|
||||||
// the rest of the values in the array from that index onward. The **guard**
|
|
||||||
// check allows it to work with `_.map`.
|
|
||||||
_.rest = _.tail = function(array, index, guard) {
|
|
||||||
return slice.call(array, (index == null) || guard ? 1 : index);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Get the last element of an array.
|
|
||||||
_.last = function(array) {
|
|
||||||
return array[array.length - 1];
|
|
||||||
};
|
|
||||||
|
|
||||||
// Trim out all falsy values from an array.
|
|
||||||
_.compact = function(array) {
|
|
||||||
return _.filter(array, function(value){ return !!value; });
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return a completely flattened version of an array.
|
|
||||||
_.flatten = function(array) {
|
|
||||||
return _.reduce(array, function(memo, value) {
|
|
||||||
if (_.isArray(value)) return memo.concat(_.flatten(value));
|
|
||||||
memo[memo.length] = value;
|
|
||||||
return memo;
|
|
||||||
}, []);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return a version of the array that does not contain the specified value(s).
|
|
||||||
_.without = function(array) {
|
|
||||||
return _.difference(array, slice.call(arguments, 1));
|
|
||||||
};
|
|
||||||
|
|
||||||
// Produce a duplicate-free version of the array. If the array has already
|
|
||||||
// been sorted, you have the option of using a faster algorithm.
|
|
||||||
// Aliased as `unique`.
|
|
||||||
_.uniq = _.unique = function(array, isSorted) {
|
|
||||||
return _.reduce(array, function(memo, el, i) {
|
|
||||||
if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) memo[memo.length] = el;
|
|
||||||
return memo;
|
|
||||||
}, []);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Produce an array that contains the union: each distinct element from all of
|
|
||||||
// the passed-in arrays.
|
|
||||||
_.union = function() {
|
|
||||||
return _.uniq(_.flatten(arguments));
|
|
||||||
};
|
|
||||||
|
|
||||||
// Produce an array that contains every item shared between all the
|
|
||||||
// passed-in arrays. (Aliased as "intersect" for back-compat.)
|
|
||||||
_.intersection = _.intersect = function(array) {
|
|
||||||
var rest = slice.call(arguments, 1);
|
|
||||||
return _.filter(_.uniq(array), function(item) {
|
|
||||||
return _.every(rest, function(other) {
|
|
||||||
return _.indexOf(other, item) >= 0;
|
|
||||||
});
|
|
||||||
});
|
|
||||||
};
|
|
||||||
|
|
||||||
// Take the difference between one array and another.
|
|
||||||
// Only the elements present in just the first array will remain.
|
|
||||||
_.difference = function(array, other) {
|
|
||||||
return _.filter(array, function(value){ return !_.include(other, value); });
|
|
||||||
};
|
|
||||||
|
|
||||||
// Zip together multiple lists into a single array -- elements that share
|
|
||||||
// an index go together.
|
|
||||||
_.zip = function() {
|
|
||||||
var args = slice.call(arguments);
|
|
||||||
var length = _.max(_.pluck(args, 'length'));
|
|
||||||
var results = new Array(length);
|
|
||||||
for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i);
|
|
||||||
return results;
|
|
||||||
};
|
|
||||||
|
|
||||||
// If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
|
|
||||||
// we need this function. Return the position of the first occurrence of an
|
|
||||||
// item in an array, or -1 if the item is not included in the array.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `indexOf` if available.
|
|
||||||
// If the array is large and already in sort order, pass `true`
|
|
||||||
// for **isSorted** to use binary search.
|
|
||||||
_.indexOf = function(array, item, isSorted) {
|
|
||||||
if (array == null) return -1;
|
|
||||||
var i, l;
|
|
||||||
if (isSorted) {
|
|
||||||
i = _.sortedIndex(array, item);
|
|
||||||
return array[i] === item ? i : -1;
|
|
||||||
}
|
|
||||||
if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
|
|
||||||
for (i = 0, l = array.length; i < l; i++) if (array[i] === item) return i;
|
|
||||||
return -1;
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
// Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
|
|
||||||
_.lastIndexOf = function(array, item) {
|
|
||||||
if (array == null) return -1;
|
|
||||||
if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
|
|
||||||
var i = array.length;
|
|
||||||
while (i--) if (array[i] === item) return i;
|
|
||||||
return -1;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Generate an integer Array containing an arithmetic progression. A port of
|
|
||||||
// the native Python `range()` function. See
|
|
||||||
// [the Python documentation](http://docs.python.org/library/functions.html#range).
|
|
||||||
_.range = function(start, stop, step) {
|
|
||||||
if (arguments.length <= 1) {
|
|
||||||
stop = start || 0;
|
|
||||||
start = 0;
|
|
||||||
}
|
|
||||||
step = arguments[2] || 1;
|
|
||||||
|
|
||||||
var len = Math.max(Math.ceil((stop - start) / step), 0);
|
|
||||||
var idx = 0;
|
|
||||||
var range = new Array(len);
|
|
||||||
|
|
||||||
while(idx < len) {
|
|
||||||
range[idx++] = start;
|
|
||||||
start += step;
|
|
||||||
}
|
|
||||||
|
|
||||||
return range;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Function (ahem) Functions
|
|
||||||
// ------------------
|
|
||||||
|
|
||||||
// Create a function bound to a given object (assigning `this`, and arguments,
|
|
||||||
// optionally). Binding with arguments is also known as `curry`.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `Function.bind` if available.
|
|
||||||
// We check for `func.bind` first, to fail fast when `func` is undefined.
|
|
||||||
_.bind = function(func, obj) {
|
|
||||||
if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
|
|
||||||
var args = slice.call(arguments, 2);
|
|
||||||
return function() {
|
|
||||||
return func.apply(obj, args.concat(slice.call(arguments)));
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
// Bind all of an object's methods to that object. Useful for ensuring that
|
|
||||||
// all callbacks defined on an object belong to it.
|
|
||||||
_.bindAll = function(obj) {
|
|
||||||
var funcs = slice.call(arguments, 1);
|
|
||||||
if (funcs.length == 0) funcs = _.functions(obj);
|
|
||||||
each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
|
|
||||||
return obj;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Memoize an expensive function by storing its results.
|
|
||||||
_.memoize = function(func, hasher) {
|
|
||||||
var memo = {};
|
|
||||||
hasher || (hasher = _.identity);
|
|
||||||
return function() {
|
|
||||||
var key = hasher.apply(this, arguments);
|
|
||||||
return hasOwnProperty.call(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
// Delays a function for the given number of milliseconds, and then calls
|
|
||||||
// it with the arguments supplied.
|
|
||||||
_.delay = function(func, wait) {
|
|
||||||
var args = slice.call(arguments, 2);
|
|
||||||
return setTimeout(function(){ return func.apply(func, args); }, wait);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Defers a function, scheduling it to run after the current call stack has
|
|
||||||
// cleared.
|
|
||||||
_.defer = function(func) {
|
|
||||||
return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
|
|
||||||
};
|
|
||||||
|
|
||||||
// Internal function used to implement `_.throttle` and `_.debounce`.
|
|
||||||
var limit = function(func, wait, debounce) {
|
|
||||||
var timeout;
|
|
||||||
return function() {
|
|
||||||
var context = this, args = arguments;
|
|
||||||
var throttler = function() {
|
|
||||||
timeout = null;
|
|
||||||
func.apply(context, args);
|
|
||||||
};
|
|
||||||
if (debounce) clearTimeout(timeout);
|
|
||||||
if (debounce || !timeout) timeout = setTimeout(throttler, wait);
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
// Returns a function, that, when invoked, will only be triggered at most once
|
|
||||||
// during a given window of time.
|
|
||||||
_.throttle = function(func, wait) {
|
|
||||||
return limit(func, wait, false);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Returns a function, that, as long as it continues to be invoked, will not
|
|
||||||
// be triggered. The function will be called after it stops being called for
|
|
||||||
// N milliseconds.
|
|
||||||
_.debounce = function(func, wait) {
|
|
||||||
return limit(func, wait, true);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Returns a function that will be executed at most one time, no matter how
|
|
||||||
// often you call it. Useful for lazy initialization.
|
|
||||||
_.once = function(func) {
|
|
||||||
var ran = false, memo;
|
|
||||||
return function() {
|
|
||||||
if (ran) return memo;
|
|
||||||
ran = true;
|
|
||||||
return memo = func.apply(this, arguments);
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
// Returns the first function passed as an argument to the second,
|
|
||||||
// allowing you to adjust arguments, run code before and after, and
|
|
||||||
// conditionally execute the original function.
|
|
||||||
_.wrap = function(func, wrapper) {
|
|
||||||
return function() {
|
|
||||||
var args = [func].concat(slice.call(arguments));
|
|
||||||
return wrapper.apply(this, args);
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
// Returns a function that is the composition of a list of functions, each
|
|
||||||
// consuming the return value of the function that follows.
|
|
||||||
_.compose = function() {
|
|
||||||
var funcs = slice.call(arguments);
|
|
||||||
return function() {
|
|
||||||
var args = slice.call(arguments);
|
|
||||||
for (var i = funcs.length - 1; i >= 0; i--) {
|
|
||||||
args = [funcs[i].apply(this, args)];
|
|
||||||
}
|
|
||||||
return args[0];
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
// Returns a function that will only be executed after being called N times.
|
|
||||||
_.after = function(times, func) {
|
|
||||||
return function() {
|
|
||||||
if (--times < 1) { return func.apply(this, arguments); }
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
// Object Functions
|
|
||||||
// ----------------
|
|
||||||
|
|
||||||
// Retrieve the names of an object's properties.
|
|
||||||
// Delegates to **ECMAScript 5**'s native `Object.keys`
|
|
||||||
_.keys = nativeKeys || function(obj) {
|
|
||||||
if (obj !== Object(obj)) throw new TypeError('Invalid object');
|
|
||||||
var keys = [];
|
|
||||||
for (var key in obj) if (hasOwnProperty.call(obj, key)) keys[keys.length] = key;
|
|
||||||
return keys;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Retrieve the values of an object's properties.
|
|
||||||
_.values = function(obj) {
|
|
||||||
return _.map(obj, _.identity);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Return a sorted list of the function names available on the object.
|
|
||||||
// Aliased as `methods`
|
|
||||||
_.functions = _.methods = function(obj) {
|
|
||||||
var names = [];
|
|
||||||
for (var key in obj) {
|
|
||||||
if (_.isFunction(obj[key])) names.push(key);
|
|
||||||
}
|
|
||||||
return names.sort();
|
|
||||||
};
|
|
||||||
|
|
||||||
// Extend a given object with all the properties in passed-in object(s).
|
|
||||||
_.extend = function(obj) {
|
|
||||||
each(slice.call(arguments, 1), function(source) {
|
|
||||||
for (var prop in source) {
|
|
||||||
if (source[prop] !== void 0) obj[prop] = source[prop];
|
|
||||||
}
|
|
||||||
});
|
|
||||||
return obj;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Fill in a given object with default properties.
|
|
||||||
_.defaults = function(obj) {
|
|
||||||
each(slice.call(arguments, 1), function(source) {
|
|
||||||
for (var prop in source) {
|
|
||||||
if (obj[prop] == null) obj[prop] = source[prop];
|
|
||||||
}
|
|
||||||
});
|
|
||||||
return obj;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Create a (shallow-cloned) duplicate of an object.
|
|
||||||
_.clone = function(obj) {
|
|
||||||
return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Invokes interceptor with the obj, and then returns obj.
|
|
||||||
// The primary purpose of this method is to "tap into" a method chain, in
|
|
||||||
// order to perform operations on intermediate results within the chain.
|
|
||||||
_.tap = function(obj, interceptor) {
|
|
||||||
interceptor(obj);
|
|
||||||
return obj;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Perform a deep comparison to check if two objects are equal.
|
|
||||||
_.isEqual = function(a, b) {
|
|
||||||
// Check object identity.
|
|
||||||
if (a === b) return true;
|
|
||||||
// Different types?
|
|
||||||
var atype = typeof(a), btype = typeof(b);
|
|
||||||
if (atype != btype) return false;
|
|
||||||
// Basic equality test (watch out for coercions).
|
|
||||||
if (a == b) return true;
|
|
||||||
// One is falsy and the other truthy.
|
|
||||||
if ((!a && b) || (a && !b)) return false;
|
|
||||||
// Unwrap any wrapped objects.
|
|
||||||
if (a._chain) a = a._wrapped;
|
|
||||||
if (b._chain) b = b._wrapped;
|
|
||||||
// One of them implements an isEqual()?
|
|
||||||
if (a.isEqual) return a.isEqual(b);
|
|
||||||
if (b.isEqual) return b.isEqual(a);
|
|
||||||
// Check dates' integer values.
|
|
||||||
if (_.isDate(a) && _.isDate(b)) return a.getTime() === b.getTime();
|
|
||||||
// Both are NaN?
|
|
||||||
if (_.isNaN(a) && _.isNaN(b)) return false;
|
|
||||||
// Compare regular expressions.
|
|
||||||
if (_.isRegExp(a) && _.isRegExp(b))
|
|
||||||
return a.source === b.source &&
|
|
||||||
a.global === b.global &&
|
|
||||||
a.ignoreCase === b.ignoreCase &&
|
|
||||||
a.multiline === b.multiline;
|
|
||||||
// If a is not an object by this point, we can't handle it.
|
|
||||||
if (atype !== 'object') return false;
|
|
||||||
// Check for different array lengths before comparing contents.
|
|
||||||
if (a.length && (a.length !== b.length)) return false;
|
|
||||||
// Nothing else worked, deep compare the contents.
|
|
||||||
var aKeys = _.keys(a), bKeys = _.keys(b);
|
|
||||||
// Different object sizes?
|
|
||||||
if (aKeys.length != bKeys.length) return false;
|
|
||||||
// Recursive comparison of contents.
|
|
||||||
for (var key in a) if (!(key in b) || !_.isEqual(a[key], b[key])) return false;
|
|
||||||
return true;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given array or object empty?
|
|
||||||
_.isEmpty = function(obj) {
|
|
||||||
if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
|
|
||||||
for (var key in obj) if (hasOwnProperty.call(obj, key)) return false;
|
|
||||||
return true;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value a DOM element?
|
|
||||||
_.isElement = function(obj) {
|
|
||||||
return !!(obj && obj.nodeType == 1);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value an array?
|
|
||||||
// Delegates to ECMA5's native Array.isArray
|
|
||||||
_.isArray = nativeIsArray || function(obj) {
|
|
||||||
return toString.call(obj) === '[object Array]';
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given variable an object?
|
|
||||||
_.isObject = function(obj) {
|
|
||||||
return obj === Object(obj);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given variable an arguments object?
|
|
||||||
_.isArguments = function(obj) {
|
|
||||||
return !!(obj && hasOwnProperty.call(obj, 'callee'));
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value a function?
|
|
||||||
_.isFunction = function(obj) {
|
|
||||||
return !!(obj && obj.constructor && obj.call && obj.apply);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value a string?
|
|
||||||
_.isString = function(obj) {
|
|
||||||
return !!(obj === '' || (obj && obj.charCodeAt && obj.substr));
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value a number?
|
|
||||||
_.isNumber = function(obj) {
|
|
||||||
return !!(obj === 0 || (obj && obj.toExponential && obj.toFixed));
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is the given value `NaN`? `NaN` happens to be the only value in JavaScript
|
|
||||||
// that does not equal itself.
|
|
||||||
_.isNaN = function(obj) {
|
|
||||||
return obj !== obj;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value a boolean?
|
|
||||||
_.isBoolean = function(obj) {
|
|
||||||
return obj === true || obj === false;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value a date?
|
|
||||||
_.isDate = function(obj) {
|
|
||||||
return !!(obj && obj.getTimezoneOffset && obj.setUTCFullYear);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is the given value a regular expression?
|
|
||||||
_.isRegExp = function(obj) {
|
|
||||||
return !!(obj && obj.test && obj.exec && (obj.ignoreCase || obj.ignoreCase === false));
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given value equal to null?
|
|
||||||
_.isNull = function(obj) {
|
|
||||||
return obj === null;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Is a given variable undefined?
|
|
||||||
_.isUndefined = function(obj) {
|
|
||||||
return obj === void 0;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Utility Functions
|
|
||||||
// -----------------
|
|
||||||
|
|
||||||
// Run Underscore.js in *noConflict* mode, returning the `_` variable to its
|
|
||||||
// previous owner. Returns a reference to the Underscore object.
|
|
||||||
_.noConflict = function() {
|
|
||||||
root._ = previousUnderscore;
|
|
||||||
return this;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Keep the identity function around for default iterators.
|
|
||||||
_.identity = function(value) {
|
|
||||||
return value;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Run a function **n** times.
|
|
||||||
_.times = function (n, iterator, context) {
|
|
||||||
for (var i = 0; i < n; i++) iterator.call(context, i);
|
|
||||||
};
|
|
||||||
|
|
||||||
// Add your own custom functions to the Underscore object, ensuring that
|
|
||||||
// they're correctly added to the OOP wrapper as well.
|
|
||||||
_.mixin = function(obj) {
|
|
||||||
each(_.functions(obj), function(name){
|
|
||||||
addToWrapper(name, _[name] = obj[name]);
|
|
||||||
});
|
|
||||||
};
|
|
||||||
|
|
||||||
// Generate a unique integer id (unique within the entire client session).
|
|
||||||
// Useful for temporary DOM ids.
|
|
||||||
var idCounter = 0;
|
|
||||||
_.uniqueId = function(prefix) {
|
|
||||||
var id = idCounter++;
|
|
||||||
return prefix ? prefix + id : id;
|
|
||||||
};
|
|
||||||
|
|
||||||
// By default, Underscore uses ERB-style template delimiters, change the
|
|
||||||
// following template settings to use alternative delimiters.
|
|
||||||
_.templateSettings = {
|
|
||||||
evaluate : /<%([\s\S]+?)%>/g,
|
|
||||||
interpolate : /<%=([\s\S]+?)%>/g
|
|
||||||
};
|
|
||||||
|
|
||||||
// JavaScript micro-templating, similar to John Resig's implementation.
|
|
||||||
// Underscore templating handles arbitrary delimiters, preserves whitespace,
|
|
||||||
// and correctly escapes quotes within interpolated code.
|
|
||||||
_.template = function(str, data) {
|
|
||||||
var c = _.templateSettings;
|
|
||||||
var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
|
|
||||||
'with(obj||{}){__p.push(\'' +
|
|
||||||
str.replace(/\\/g, '\\\\')
|
|
||||||
.replace(/'/g, "\\'")
|
|
||||||
.replace(c.interpolate, function(match, code) {
|
|
||||||
return "'," + code.replace(/\\'/g, "'") + ",'";
|
|
||||||
})
|
|
||||||
.replace(c.evaluate || null, function(match, code) {
|
|
||||||
return "');" + code.replace(/\\'/g, "'")
|
|
||||||
.replace(/[\r\n\t]/g, ' ') + "__p.push('";
|
|
||||||
})
|
|
||||||
.replace(/\r/g, '\\r')
|
|
||||||
.replace(/\n/g, '\\n')
|
|
||||||
.replace(/\t/g, '\\t')
|
|
||||||
+ "');}return __p.join('');";
|
|
||||||
var func = new Function('obj', tmpl);
|
|
||||||
return data ? func(data) : func;
|
|
||||||
};
|
|
||||||
|
|
||||||
// The OOP Wrapper
|
|
||||||
// ---------------
|
|
||||||
|
|
||||||
// If Underscore is called as a function, it returns a wrapped object that
|
|
||||||
// can be used OO-style. This wrapper holds altered versions of all the
|
|
||||||
// underscore functions. Wrapped objects may be chained.
|
|
||||||
var wrapper = function(obj) { this._wrapped = obj; };
|
|
||||||
|
|
||||||
// Expose `wrapper.prototype` as `_.prototype`
|
|
||||||
_.prototype = wrapper.prototype;
|
|
||||||
|
|
||||||
// Helper function to continue chaining intermediate results.
|
|
||||||
var result = function(obj, chain) {
|
|
||||||
return chain ? _(obj).chain() : obj;
|
|
||||||
};
|
|
||||||
|
|
||||||
// A method to easily add functions to the OOP wrapper.
|
|
||||||
var addToWrapper = function(name, func) {
|
|
||||||
wrapper.prototype[name] = function() {
|
|
||||||
var args = slice.call(arguments);
|
|
||||||
unshift.call(args, this._wrapped);
|
|
||||||
return result(func.apply(_, args), this._chain);
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
// Add all of the Underscore functions to the wrapper object.
|
|
||||||
_.mixin(_);
|
|
||||||
|
|
||||||
// Add all mutator Array functions to the wrapper.
|
|
||||||
each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
|
|
||||||
var method = ArrayProto[name];
|
|
||||||
wrapper.prototype[name] = function() {
|
|
||||||
method.apply(this._wrapped, arguments);
|
|
||||||
return result(this._wrapped, this._chain);
|
|
||||||
};
|
|
||||||
});
|
|
||||||
|
|
||||||
// Add all accessor Array functions to the wrapper.
|
|
||||||
each(['concat', 'join', 'slice'], function(name) {
|
|
||||||
var method = ArrayProto[name];
|
|
||||||
wrapper.prototype[name] = function() {
|
|
||||||
return result(method.apply(this._wrapped, arguments), this._chain);
|
|
||||||
};
|
|
||||||
});
|
|
||||||
|
|
||||||
// Start chaining a wrapped Underscore object.
|
|
||||||
wrapper.prototype.chain = function() {
|
|
||||||
this._chain = true;
|
|
||||||
return this;
|
|
||||||
};
|
|
||||||
|
|
||||||
// Extracts the result from a wrapped and chained object.
|
|
||||||
wrapper.prototype.value = function() {
|
|
||||||
return this._wrapped;
|
|
||||||
};
|
|
||||||
|
|
||||||
})();
|
|
||||||
Loading…
Reference in New Issue