Access list element in javascript

Question

I am getting this list from server(php):

["Ak-Bulak","Balykchy","Batken"]

how can i access it and put into selects options thru js, what i tried is:

for (var i in data) {
   $('#cities').append('<option>'+ data[i] +'</option>');
}

it putting every chars as one option: <option>[</option>, <option>"</option>...

how can i access each element here? not each char..

How are you getting this list? is it a php var on your php page? — slinky2000, May 16 '13 at 11:11
Please don't use [`for .. in`](http://stackoverflow.com/questions/500504/why-is-using-for-in-with-array-iteration-such-a-bad-idea) with arrays. — Yoshi, May 16 '13 at 11:17

slinky2000 · Answer 1 · 2013-05-16T11:18:28.983

3

If it's a var on your php page something like this would work

for (var i in <?php echo '["Ak-Bulak","Balykchy","Batken"]'; ?>) {
   $('#cities').append('<option>'+ i +'</option>');
}

edited May 16 '13 at 11:18

answered May 16 '13 at 11:12

slinky2000

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Salvatorelab · Accepted Answer · 2013-05-16T11:18:35.010

2

It seems that you don't have a list, you have a string. So first, parse that string:

var list = JSON.parse('["Ak-Bulak","Balykchy","Batken"]')

And then, loop over it as you already did, or without using keys:

for (var i=0; i<list.length; i++) {
    $('#cities').append('<option>'+ data[i] +'</option>');
}

edited May 16 '13 at 11:18

answered May 16 '13 at 11:11

Salvatorelab

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If the assumption that the user is dealing JSON is correct (and I figure it is), this is the proper answer. If you need to support a browser which does not natively support the JSON API, you can download `json2.js` from https://github.com/douglascrockford/JSON-js and load it on your page before the code which needs to parse JSON. – JAAulde May 16 '13 at 11:14
Seems he is using jQuery so he can use `jQuery.parseJSON` http://api.jquery.com/jQuery.parseJSON/ – Salvatorelab May 16 '13 at 11:14
remember to use `console.log` when strange things like this happen. You can use `console.log` with objects, and inspect them with firebug/dev tools (F12). – Salvatorelab May 16 '13 at 11:21

score 1 · Answer 3 · answered May 16 '13 at 11:11

1

You need to parse this string as JSON first.

var buffer = eval(data)
for (var i in buffer) {
    $('#cities').append('<option>'+ buffer[i] +'</option>');
}

But if you use eval() you must be sure that input data is consistent. updated.

answered May 16 '13 at 11:11

Maxim Khan-Magomedov

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Even better to use [parseJson](http://api.jquery.com/jQuery.parseJSON/). `var buffer = $.parseJson(data)` – Maxim Khan-Magomedov May 16 '13 at 11:13

score 1 · Answer 4 · answered May 16 '13 at 11:14

1

Try this,

    var data='["Ak-Bulak","Balykchy","Batken"]';
    data=JSON.parse(data);


for (var i in data) {
   $('#cities').append('<option>'+ data[i] +'</option>');
 }

answered May 16 '13 at 11:14

Shijin TR

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score 0 · Answer 5 · answered May 16 '13 at 11:16

0

What about:

var data=<?php echo '["Ak-Bulak","Balykchy","Batken"]'; ?>;

for (var i in data) {
   $('#cities').append('<option>'+ data[i] +'</option>');
}

answered May 16 '13 at 11:16

Frederik.L

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Access list element in javascript

5 Answers5