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adding an initial implementation of a 'pick' function. #523

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Jeremy Ashkenas
2012-04-02 15:01:26 -04:00
parent 4fa0a9f4d5
commit 719cd24aa9
3 changed files with 18 additions and 20 deletions
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13
index.html
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@@ -214,6 +214,7 @@
<li>- <a href="#values">values</a></li>
<li>- <a href="#object-functions">functions</a></li>
<li>- <a href="#extend">extend</a></li>
<li>- <a href="#pick">pick</a></li>
<li>- <a href="#defaults">defaults</a></li>
<li>- <a href="#clone">clone</a></li>
<li>- <a href="#tap">tap</a></li>
@@ -1016,16 +1017,14 @@ _.extend({name : 'moe'}, {age : 50});
=&gt; {name : 'moe', age : 50}
</pre>
<p id="restrict">
<b class="header">restrict</b><code>_.restrict(source, *keys)</code>
<p id="pick">
<b class="header">pick</b><code>_.pick(object, *keys)</code>
<br />
Return a clone of the <b>source</b> with only the properties with the
property names, or arrays of property names, provided in <b>keys</b>.
Return a copy of the <b>object</b>, filtered to only have values for
the whitelisted <b>keys</b> (or array of valid keys).
</p>
<pre>
_.restrict({name : 'moe', age: 50, userid : 'moe1'}, 'name', 'age');
=&gt; {name : 'moe', age : 50}
_.restrict({name : 'moe', age: 50, userid : 'moe1'}, ['name', 'age']);
_.pick({name : 'moe', age: 50, userid : 'moe1'}, 'name', 'age');
=&gt; {name : 'moe', age : 50}
</pre>