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Fixing broken link, adding explanation of _.map's iterator's arguments, and adding extra examples to _.map and _.each.

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Samuel Clay
2010-08-31 12:26:23 -04:00
parent 7a4ddca64d
commit 3588d11adc
1 changed files with 10 additions and 5 deletions
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@@ -225,7 +225,7 @@ _(lyrics).chain()
<p> <p>
In addition, the In addition, the
<a href="https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Objects/Array">Array prototype's methods</a> <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/prototype">Array prototype's methods</a>
are proxied through the chained Underscore object, so you can slip a are proxied through the chained Underscore object, so you can slip a
<tt>reverse</tt> or a <tt>push</tt> into your chain, and continue to <tt>reverse</tt> or a <tt>push</tt> into your chain, and continue to
modify the array. modify the array.
@@ -247,17 +247,22 @@ _(lyrics).chain()
</p> </p>
<pre> <pre>
_.each([1, 2, 3], function(num){ alert(num); }); _.each([1, 2, 3], function(num){ alert(num); });
=&gt; alerts each number in turn...
_.each({one : 1, two : 2, three : 3}, function(num, key){ alert(num); });
=&gt; alerts each number in turn...</pre> =&gt; alerts each number in turn...</pre>
<p id="map"> <p id="map">
<b class="header">map</b><code>_.map(list, iterator, [context])</code> <b class="header">map</b><code>_.map(list, iterator, [context])</code>
<br /> <br />
Produces a new array of values by mapping each value in <b>list</b> Produces a new array of values by mapping each value in <b>list</b>
through a transformation function (<b>iterator</b>). If the native through a transformation function (<b>iterator</b>). If the native <b>map</b> method
<b>map</b> method exists, it will be used instead. exists, it will be used instead. If <b>list</b> is a JavaScript object,
<b>iterator</b>'s arguments will be <tt>(value, key, list)</tt>.
</p> </p>
<pre> <pre>
_.map([1, 2, 3], function(num){ return num * 3 }); _.map([1, 2, 3], function(num){ return num * 3; });
=&gt; [3, 6, 9]
_.map({one : 1, two : 2, three : 3}, function(num, key){ return num * 3; });
=&gt; [3, 6, 9]</pre> =&gt; [3, 6, 9]</pre>
<p id="reduce"> <p id="reduce">
@@ -270,7 +275,7 @@ _.map([1, 2, 3], function(num){ return num * 3 });
<b>iterator</b>. <b>iterator</b>.
</p> </p>
<pre> <pre>
var sum = _.reduce([1, 2, 3], function(memo, num){ return memo + num }, 0); var sum = _.reduce([1, 2, 3], function(memo, num){ return memo + num; }, 0);
=&gt; 6 =&gt; 6
</pre> </pre>