blocks|key|42121|text|我所能看到的就是有两个JSON对象，用逗号分隔。如果它们都在一个数组([...])中，这会更有意义。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|42122|而且，如果它们在一个数组中，那么您只需要使用标准的"for+var+i=+0...“循环的类型。实际上，我认为它将尝试检索字符串"1“的"id”属性，然后检索"hi“的"id”属性，依此类推。|42123|entityMap^0|Z|5|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

Well, all I can see there is that you have two JSON objects, seperated by a comma. If both of them were inside an array (<code>[...]</code>) it would make more sense.

And, if they ARE inside of an array, then you would just be using the standard "for var i = 0..." type of loop. As it is, I think it's going to try to retrieve the "id" property of the string "1", then "id" of "hi", and so on.

blocks|key|42143|text|您的JSON应该如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|42144|var+json+=+[{
++++"id"+:+"1",+
++++"msg"+++:+"hi",
++++"tid"+:+"2013-05-05+23:35",
++++"fromWho":+"hello1@email.se"
},
{
++++"id"+:+"2",+
++++"msg"+++:+"there",
++++"tid"+:+"2013-05-05+23:45",
++++"fromWho":+"hello2@email.se"
}];|code-block|syntax|javascript|42145|您可以像这样循环遍历Array：|42146|for(var+i+=+0;+i+<+json.length;+i%2B%2B)+{
++++var+obj+=+json[i];

++++console.log(obj.id);
}|42147|或者像这样(来自Eric的建议)小心IE支持|42148|json.forEach(function(obj)+{+console.log(obj.id);+});|42149|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Your JSON should look like this:

<pre><code>var json = [{
 "id" : "1", 
 "msg" : "hi",
 "tid" : "2013-05-05 23:35",
 "fromWho": "hello1@email.se"
},
{
 "id" : "2", 
 "msg" : "there",
 "tid" : "2013-05-05 23:45",
 "fromWho": "hello2@email.se"
}];
</code></pre>

You can loop over the Array like this:

<pre><code>for(var i = 0; i &lt; json.length; i++) {
 var obj = json[i];

 console.log(obj.id);
}
</code></pre>

Or like this (suggested from Eric) be careful with IE support

<pre><code>json.forEach(function(obj) { console.log(obj.id); });
</code></pre>

blocks|key|259045|text|如果你想遍历它，它必须是一个数组。你很可能错过了[和]。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|259046|var+x+=+[{
++++"id":+"1",
++++++++"msg":+"hi",
++++++++"tid":+"2013-05-05+23:35",
++++++++"fromWho":+"hello1@email.se"
},+{
++++"id":+"2",
++++++++"msg":+"there",
++++++++"tid":+"2013-05-05+23:45",
++++++++"fromWho":+"hello2@email.se"
}];

var+$output+=+$('#output');
for(var+i+=+0;+i+<+x.length;+i%2B%2B)+{
++++console.log(x[i].id);
}|code-block|syntax|javascript|259047|查看这个jsfiddle：http://jsfiddle.net/lpiepiora/kN7yZ/|259048|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/lpiepiora/kN7yZ/^0|O|1|Q|1|0|0|D|10|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@$9|11|A|12|1|13]]|E|$]]|$1|M|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

It must be an array if you want to iterate over it. You're very likely missing <code>[</code> and <code>]</code>.

<pre><code>var x = [{
 "id": "1",
 "msg": "hi",
 "tid": "2013-05-05 23:35",
 "fromWho": "hello1@email.se"
}, {
 "id": "2",
 "msg": "there",
 "tid": "2013-05-05 23:45",
 "fromWho": "hello2@email.se"
}];

var $output = $('#output');
for(var i = 0; i &lt; x.length; i++) {
 console.log(x[i].id);
}
</code></pre>

Check out this jsfiddle: <a href="http://jsfiddle.net/lpiepiora/kN7yZ/" rel="noreferrer">http://jsfiddle.net/lpiepiora/kN7yZ/</a>

blocks|key|42214|text|它起作用了。我刚刚在JSON数据中添加了方括号。数据为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|42215|var+data+=+[
++++{+
++++++++"id":+"1",
++++++++"msg":+"hi",+
++++++++"tid":+"2013-05-05+23:35",+
++++++++"fromWho":+"hello1@email.se"+
++++},+
++++{+
++++++++"id":+"2",+
++++++++"msg":+"there",+
++++++++"tid":+"2013-05-05+23:45",+
++++++++"fromWho":+"hello2@email.se"
++++}
]|code-block|syntax|javascript|42216|循环是：|42217|for+(var+key+in+data)+{
+++if+(data.hasOwnProperty(key))+{
+++++++++alert(data[key].id);
+++}
}+|42218|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

It is working. I just added square brackets to JSON data. The data is:

<pre><code>var data = [
 { 
 "id": "1",
 "msg": "hi", 
 "tid": "2013-05-05 23:35", 
 "fromWho": "hello1@email.se" 
 }, 
 { 
 "id": "2", 
 "msg": "there", 
 "tid": "2013-05-05 23:45", 
 "fromWho": "hello2@email.se"
 }
]
</code></pre>

And the loop is:

<pre><code>for (var key in data) {
 if (data.hasOwnProperty(key)) {
 alert(data[key].id);
 }
} 
</code></pre>

blocks|key|42271|text|在你的代码中有一些问题，首先你的json必须看起来像这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|42272|var+json+=+[{
"id"+:+"1",+
"msg"+++:+"hi",
"tid"+:+"2013-05-05+23:35",
"fromWho":+"hello1@email.se"
},
{
"id"+:+"2",+
"msg"+++:+"there",
"tid"+:+"2013-05-05+23:45",
"fromWho":+"hello2@email.se"
}];|code-block|syntax|javascript|42273|接下来，您可以像这样迭代：|42274|for+(var+key+in+json)+{
if+(json.hasOwnProperty(key))+{
++alert(json[key].id);
++alert(json[key].msg);
}
}|42275|它给出了完美的结果。|42276|请看这里的小提琴：http://jsfiddle.net/zrSmp/|offset|length|42277|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/zrSmp/^0|0|0|0|0|0|9|Q|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

There's a few problems in your code, first your json must look like :

<pre><code>var json = [{
"id" : "1", 
"msg" : "hi",
"tid" : "2013-05-05 23:35",
"fromWho": "hello1@email.se"
},
{
"id" : "2", 
"msg" : "there",
"tid" : "2013-05-05 23:45",
"fromWho": "hello2@email.se"
}];
</code></pre>

Next, you can iterate like this :

<pre><code>for (var key in json) {
if (json.hasOwnProperty(key)) {
 alert(json[key].id);
 alert(json[key].msg);
}
}
</code></pre>

And it gives perfect result.

See the fiddle here : <a href="http://jsfiddle.net/zrSmp/" rel="noreferrer">http://jsfiddle.net/zrSmp/</a>

blocks|key|42322|text|有点晚了，但我希望我能帮助别人:D|type|unstyled|depth|inlineStyleRanges|entityRanges|data|42323|你的json需要看起来像Niklas已经说过的东西。然后你就可以了：|42324|for(var+key+in+currentObject){
++++++++if(currentObject.hasOwnProperty(key))+{
++++++++++console.info(key+%2B+':+'+%2B+currentObject[key]);
++++++++}
+++}|code-block|syntax|javascript|42325|如果你有一个多维数组，这是你的代码：|42326|for+(var+i+=+0;+i+<+multiDimensionalArray.length;+i%2B%2B)+{
++++var+currentObject+=+multiDimensionalArray[i]
++++for(var+key+in+currentObject){
++++++++++++if(currentObject.hasOwnProperty(key))+{
++++++++++++++console.info(key+%2B+':+'+%2B+currentObject[key]);
++++++++++++}
+++++++}
}|42327|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

A bit late but i hope i may help others :D

your json needs to look like something Niklas already said. And then here you go:

<pre><code>for(var key in currentObject){
 if(currentObject.hasOwnProperty(key)) {
 console.info(key + ': ' + currentObject[key]);
 }
 }
</code></pre>

if you have an Multidimensional array, this is your code: 

<pre><code>for (var i = 0; i &lt; multiDimensionalArray.length; i++) {
 var currentObject = multiDimensionalArray[i]
 for(var key in currentObject){
 if(currentObject.hasOwnProperty(key)) {
 console.info(key + ': ' + currentObject[key]);
 }
 }
}
</code></pre>

blocks|key|259177|text|使用map和arrow+function的简短解决方案|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|259178|​|259179|var+data+=+[{
++"id":+"1",
++"msg":+"hi",
++"tid":+"2013-05-05+23:35",
++"fromWho":+"hello1@email.se"
},+{
++"id":+"2",
++"msg":+"there",
++"tid":+"2013-05-05+23:45",
++"fromWho":+"hello2@email.se"
}];
data.map((item,+i)+=>+console.log('Index:',+i,+'Id:',+item.id));|code-block|syntax|javascript|259180|259181|当属性"id"不存在时，可以使用filter来介绍这些情况|259182|259183|var+data+=+[{
++"id":+"1",
++"msg":+"hi",
++"tid":+"2013-05-05+23:35",
++"fromWho":+"hello1@email.se"
},+{
++"id":+"2",
++"msg":+"there",
++"tid":+"2013-05-05+23:45",
++"fromWho":+"hello2@email.se"
},+{
++"msg":+"abcde",
++"tid":+"2013-06-06+23:46",
++"fromWho":+"hello3@email.se"
}];

data.filter(item=>item.hasOwnProperty('id'))
++++++++++++++++.map((item,+i)+=>+console.log('Index:',+i,+'Id:',+item.id));|259184|259185|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map|1|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions|2|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter^0|2|3|2|3|0|6|E|1|0|0|0|0|3|4|G|6|G|6|2|0|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@$9|18|A|19|1|1A]|$9|1B|A|1C|1|1D]]|E|$]]|$1|F|3|G|5|6|7|1E|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1F|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|1G|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1H|8|@$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@$9|1M|A|1N|1|1O]]|E|$]]|$1|P|3|G|5|6|7|1P|8|@]|D|@]|E|$]]|$1|Q|3|R|5|J|7|1Q|8|@]|D|@]|E|$K|L]]|$1|S|3|G|5|6|7|1R|8|@]|D|@]|E|$]]|$1|T|3|-4|5|6|7|1S|8|@]|D|@]|E|$]]]|U|$V|$5|W|X|Y|E|$Z|10]]|11|$5|W|X|Y|E|$Z|12]]|13|$5|W|X|Y|E|$Z|14]]]]

A short solution using <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map" rel="nofollow noreferrer"><code>map</code></a> and an <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions" rel="nofollow noreferrer">arrow function</a>

<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var data = [{
 "id": "1",
 "msg": "hi",
 "tid": "2013-05-05 23:35",
 "fromWho": "hello1@email.se"
}, {
 "id": "2",
 "msg": "there",
 "tid": "2013-05-05 23:45",
 "fromWho": "hello2@email.se"
}];
data.map((item, i) =&gt; console.log('Index:', i, 'Id:', item.id));</code></pre>
</div>
</div>


And to cover the cases when the property <code>"id"</code> is not present use <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter" rel="nofollow noreferrer"><code>filter</code></a>:

<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var data = [{
 "id": "1",
 "msg": "hi",
 "tid": "2013-05-05 23:35",
 "fromWho": "hello1@email.se"
}, {
 "id": "2",
 "msg": "there",
 "tid": "2013-05-05 23:45",
 "fromWho": "hello2@email.se"
}, {
 "msg": "abcde",
 "tid": "2013-06-06 23:46",
 "fromWho": "hello3@email.se"
}];

data.filter(item=&gt;item.hasOwnProperty('id'))
 .map((item, i) =&gt; console.log('Index:', i, 'Id:', item.id));</code></pre>
</div>
</div>

blocks|key|42407|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|42408|var+json+=+[{
++++"id"+:+"1",+
++++"msg"+++:+"hi",
++++"tid"+:+"2013-05-05+23:35",
++++"fromWho":+"hello1@email.se"
},
{
++++"id"+:+"2",+
++++"msg"+++:+"there",
++++"tid"+:+"2013-05-05+23:45",
++++"fromWho":+"hello2@email.se"
}];

json.forEach((item)+=>+{
++console.log('ID:+'+%2B+item.id);
++console.log('MSG:+'+%2B+item.msg);
++console.log('TID:+'+%2B+item.tid);
++console.log('FROMWHO:+'+%2B+item.fromWho);
});|code-block|syntax|javascript|42409|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|$]]

try this 

<pre><code>var json = [{
 "id" : "1", 
 "msg" : "hi",
 "tid" : "2013-05-05 23:35",
 "fromWho": "hello1@email.se"
},
{
 "id" : "2", 
 "msg" : "there",
 "tid" : "2013-05-05 23:45",
 "fromWho": "hello2@email.se"
}];

json.forEach((item) =&gt; {
 console.log('ID: ' + item.id);
 console.log('MSG: ' + item.msg);
 console.log('TID: ' + item.tid);
 console.log('FROMWHO: ' + item.fromWho);
});
</code></pre>

blocks|key|259230|text|您的数据片段需要稍微扩展一下，并且必须以这种方式才能成为合适的json。请注意，我只包含了数组名称属性"item“|type|unstyled|depth|inlineStyleRanges|entityRanges|data|259231|{"item":[
{
++"id":+"1",
++"msg":+"hi",
++"tid":+"2013-05-05+23:35",
++"fromWho":+"hello1@email.se"
},+{
++"id":+"2",
++"msg":+"there",
++"tid":+"2013-05-05+23:45",
++"fromWho":+"hello2@email.se"
}]}|code-block|syntax|javascript|259232|您的java脚本很简单|259233|var+objCount+=+json.item.length;
for+(+var+x=0;+x+<+objCount+;+xx%2B%2B+)+{
++++var+curitem+=+json.item[x];
}|259234|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

your data snippet need to be expanded a little, and it has to be this way to be proper json. notice I just include the array name attribute &quot;item&quot;
<pre><code>{&quot;item&quot;:[
{
 &quot;id&quot;: &quot;1&quot;,
 &quot;msg&quot;: &quot;hi&quot;,
 &quot;tid&quot;: &quot;2013-05-05 23:35&quot;,
 &quot;fromWho&quot;: &quot;hello1@email.se&quot;
}, {
 &quot;id&quot;: &quot;2&quot;,
 &quot;msg&quot;: &quot;there&quot;,
 &quot;tid&quot;: &quot;2013-05-05 23:45&quot;,
 &quot;fromWho&quot;: &quot;hello2@email.se&quot;
}]}
</code></pre>
your java script is simply
<pre><code>var objCount = json.item.length;
for ( var x=0; x &lt; objCount ; xx++ ) {
 var curitem = json.item[x];
}
</code></pre>

blocks|key|259253|text|非常简单的方法！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|259254|var+tire_price_data+=+JSON.parse('[{"qty":"250.0000","price":"0.390000"},{"qty":"500.0000","price":"0.340000"},{"qty":"1000.0000","price":"0.290000"}]');+
tire_price_data.forEach(function(obj){
++++console.log(obj);
++++console.log(obj.qty);
++++console.log(obj.price);
})|code-block|syntax|javascript|259255|谢谢。|259256|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

the very easy way!
<pre><code>var tire_price_data = JSON.parse('[{&quot;qty&quot;:&quot;250.0000&quot;,&quot;price&quot;:&quot;0.390000&quot;},{&quot;qty&quot;:&quot;500.0000&quot;,&quot;price&quot;:&quot;0.340000&quot;},{&quot;qty&quot;:&quot;1000.0000&quot;,&quot;price&quot;:&quot;0.290000&quot;}]'); 
tire_price_data.forEach(function(obj){
 console.log(obj);
 console.log(obj.qty);
 console.log(obj.price);
})
</code></pre>
Thank you.

blocks|key|259283|text|var+json+=+{
++++"persons":+[
++++++++{"name":+"Lili",+"age":+23,+"is_student":+true},
++++++++{"name":+"James",+"age":+24,+"is_student":+true},
++++++++{"name":+"John",+"age":+25,+"is_student":+false}
++++]
};

for+(var+key+in+json.persons)+{
++++for+(var+keyName+in+json.persons[key])+{
++++++++alert(keyName+%2B+':+'+%2B+(json.persons[key])[keyName]);
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|259284|//输出:姓名:莉莉，年龄:23，is_student:true，...|unstyled|259285|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>var json = {
 &quot;persons&quot;: [
 {&quot;name&quot;: &quot;Lili&quot;, &quot;age&quot;: 23, &quot;is_student&quot;: true},
 {&quot;name&quot;: &quot;James&quot;, &quot;age&quot;: 24, &quot;is_student&quot;: true},
 {&quot;name&quot;: &quot;John&quot;, &quot;age&quot;: 25, &quot;is_student&quot;: false}
 ]
};

for (var key in json.persons) {
 for (var keyName in json.persons[key]) {
 alert(keyName + ': ' + (json.persons[key])[keyName]);
 }
}
</code></pre>
//Output: name:Lili, age:23, is_student:true, ...

blocks|key|42535|text|您可以使用for循环，然后获取可以解构它们的值|type|unstyled|depth|inlineStyleRanges|entityRanges|data|42536|const+arr+=+[
++++++++{
++++++++++++id:123,
++++++++++++desc:"do+something",
++++++++++++isDone:false
++++++++},
++++++++{
++++++++++++id:124,
++++++++++++desc:"do+something",
++++++++++++isDone:true
++++++++}
++++]

for(let+_i+in+arr){
++++let+{id,+desc,+isDone}+=+arr[_i]
++++//+do+something
++++console.log({id,+desc,+isDone});
}|code-block|syntax|javascript|42537|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|$]]

you can use a for-loop then to get the values you can De-structure them
<pre><code>const arr = [
 {
 id:123,
 desc:&quot;do something&quot;,
 isDone:false
 },
 {
 id:124,
 desc:&quot;do something&quot;,
 isDone:true
 }
 ]

for(let _i in arr){
 let {id, desc, isDone} = arr[_i]
 // do something
 console.log({id, desc, isDone});
}


</code></pre>

I am trying to loop through the following json array:
<pre><code>{
 &quot;id&quot;: &quot;1&quot;,
 &quot;msg&quot;: &quot;hi&quot;,
 &quot;tid&quot;: &quot;2013-05-05 23:35&quot;,
 &quot;fromWho&quot;: &quot;hello1@email.se&quot;
}, {
 &quot;id&quot;: &quot;2&quot;,
 &quot;msg&quot;: &quot;there&quot;,
 &quot;tid&quot;: &quot;2013-05-05 23:45&quot;,
 &quot;fromWho&quot;: &quot;hello2@email.se&quot;
}
</code></pre>
And have tried the following
<pre><code>for (var key in data) {
 if (data.hasOwnProperty(key)) {
 console.log(data[key].id);
 }
}
</code></pre>
But for some reason I'm only getting the first part, id 1 values.
Any ideas?

JavaScript loop through JSON array?

JSON

我正在尝试遍历以下json数组：{  "id": "1",  "msg": "hi",  "tid": "2013-05-05 23:35",  "fromWho": "hello1@email.se"}, {  "id": "2",  "msg": "there",  "tid": "2013-05-05 23:45...

问JavaScript循环通过JSON数组？
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