blocks|key|853508|text|您可以通过for循环轻松地获取它们的数组，例如：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|853509|var+keys+=+[];
for(var+key+in+options)+{
++if(options.hasOwnProperty(key))+{+//to+be+safe
++++keys.push(key);
++}
}|code-block|syntax|javascript|853510|然后按您想要的方式使用keys，例如：|853511|var+keyString+=+keys.join(",+");|853512|You+can+test+it+out+here。.hasOwnProperty()检查是安全的，以防有人篡改对象原型之类的东西。|853513|entityMap|0|LINK|mutability|MUTABLE|url|http://www.jsfiddle.net/nick_craver/Tr6dH/|1|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/hasOwnProperty^0|5|3|0|0|B|4|0|0|P|H|0|O|0|P|H|1|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@$9|1B|A|1C|1|1D]|$9|1E|A|1F|1|1G]]|E|$]]|$1|Q|3|-4|5|6|7|1H|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]]]

You can easily get an array of them via a <code>for</code> loop, for example:

<pre><code>var keys = [];
for(var key in options) {
 if(options.hasOwnProperty(key)) { //to be safe
 keys.push(key);
 }
}
</code></pre>

Then use <code>keys</code> how you want, for example:

<pre><code>var keyString = keys.join(", ");
</code></pre>

<a href="http://www.jsfiddle.net/nick_craver/Tr6dH/" rel="noreferrer">You can test it out here</a>. The <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/hasOwnProperty" rel="noreferrer"><code>.hasOwnProperty()</code></a> check is to be safe, in case anyone messed with the object prototype and such.

blocks|key|853572|text|这是一种jQuery方式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|853573|var+keys+=+[];
options+=+{key1:+"value1",+key2:+"value2"};
$.each(options,+function(key,+value)+{+keys.push(key)+})
console.log(keys)|code-block|syntax|javascript|853574|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A jQuery way of doing it:

<pre><code>var keys = [];
options = {key1: "value1", key2: "value2"};
$.each(options, function(key, value) { keys.push(key) })
console.log(keys)
</code></pre>

blocks|key|853690|text|您可以在jQuery中使用$.each()：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|853691|function+keyArray(obj)+{
++var+rv+=+[];
++$.each(options,+function(key)+{+rv.push(key);+});
++return+rv;
}|code-block|syntax|javascript|853692|然后|853693|var+keys+=+keyArray(options);|853694|给你一个数组形式的["key1",+"key2"]，你可以通过join得到一个字符串。|853695|entityMap^0|D|8|0|0|0|0|9|G|V|4|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|R|$]]

You can use <code>$.each()</code> in jQuery:

<pre><code>function keyArray(obj) {
 var rv = [];
 $.each(options, function(key) { rv.push(key); });
 return rv;
}
</code></pre>

then

<pre><code>var keys = keyArray(options);
</code></pre>

gives you <code>["key1", "key2"]</code> as an array, which you could <code>join</code> to get a string.

blocks|key|1068203|text|options+=+{key1:+"value1",+key2:+"value2"};
keys+=+Object.keys(options);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1068204|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>options = {key1: "value1", key2: "value2"};
keys = Object.keys(options);
</code></pre>

blocks|key|1068240|text|您现在可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1068241|Object.keys(obj)|code-block|syntax|javascript|1068242|以获取由对象中的可用键组成的数组。Mozilla+has+usage+and+availability+information。|offset|length|1068243|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys^0|0|0|H|1A|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

You can now use

<pre><code>Object.keys(obj)
</code></pre>

to get an array consisting of the available keys in an object. <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys" rel="nofollow">Mozilla has usage and availability information</a>.

I was wondering if there was a quick way to extract keys of associative array into an array, or comma-separated list using JavaScript (jQuery is ok).

<pre><code>options = {key1: "value1", key2: "value2"};
</code></pre>

Result should be the array:

<pre><code>["key1", "key2"]
</code></pre>

or just a string: 

<pre><code>"key1, key2"
</code></pre>

Get all keys of a JavaScript object

jQuery

我想知道是否有一种快速的方法可以使用JavaScript (jQuery可以)将关联数组的键提取到数组中，或者提取到逗号分隔的列表中。options = {key1: "value1", key2: "value2"};结果应该是数组：["key1", "key2"]或者仅仅是一个字符串："key1, key2"

问获取JavaScript对象的所有键
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