For loop loops through every character from array

Question

I'm having some trouble with my array.

It loops through every character of the array, so including the [ and ".

My code:

for (var i = 0; i < array.length; i++) {
   alert(array[i]);
   //Do something
}

The array looks like this: ["1", "2", "1"]

It seems your "array" is not an array, but a JSON representation of an array: a string. — Amadan, Aug 31 '16 at 06:09
@KamilLatosinski— "a json"? JSON is a notation, the OP likely has a string that is an array in JSON format, or a javascript array literal. — RobG, Aug 31 '16 at 06:12
@mplungjan In my opinion you should create a answer to this question. I will accept it as correct, because you are the first that came with the correct answer — Chris, Aug 31 '16 at 06:27

score 2 · Answer 1 · answered Aug 31 '16 at 06:13

2

You are looping a string and thus it shows characters of the string. You might want to convert the string into an array before looping. The best way will be to use JSON.parse function.

// Add this
array = JSON.parse(array);
for (var i = 0; i < array.length; i++) {
alert(array[i]);
//Do something
}

answered Aug 31 '16 at 06:13

PDK

138
5

Sorry, didn't notice while writing the answer. That "Go away" was unneeded though. – PDK Aug 31 '16 at 06:14
So I removed it... I forgot the ;) – mplungjan Aug 31 '16 at 06:14
1

Nice job in the comments. But shouldn't you try to answer instead? Most of the searchers do not tend to search in the comments and look directly in the answers. – PDK Aug 31 '16 at 06:18
@mplungjan sorry but I think it is much clearer if the comments are summerized or illustrated on an answer otherwise this site would look like an old ages forum. – C.Champagne Aug 31 '16 at 06:23
Fair enough. I did not feel it was worth answering since the comments already gave OP the reason. Anyway - I converted my comment to an answer – mplungjan Aug 31 '16 at 06:40

score 2 · Accepted Answer · answered Aug 31 '16 at 06:39

2

Converting comment to answer.

Understanding that you had a string representation of an array, you can convert it to array using JSON.parse

var arrayString='["1", "2", "1"]',
    array = JSON.parse(arrayString);
for (var i = 0; i < array.length; i++) {
   console.log(array[i]);
   //Do something
}

answered Aug 31 '16 at 06:39

mplungjan

169,008
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Thanks again @mplungjan! – Chris Aug 31 '16 at 06:39

score 1 · Answer 3 · answered Aug 31 '16 at 06:13

1

use this

array=JSON.parse(array);
for (var i = 0; i < array.length; i++) {
   alert(array[i]);
   //Do something
}

answered Aug 31 '16 at 06:13

MAREESKANNNAN RAJENDRAN

517
5
17

Of course an answer is still needed. The person posting the answer as a comment made the mistake here. – Ingo Bürk Aug 31 '16 at 06:18

score 0 · Answer 4 · edited May 23 '17 at 12:01

0

If the browser has the JSON object then

JSON.parse(string);

or if you have jQuery

$.parseJSON(string);

Source : https://stackoverflow.com/a/9420607/5326667

edited May 23 '17 at 12:01

Community

1
1

answered Aug 31 '16 at 06:25

Mannan Bahelim

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For loop loops through every character from array

4 Answers4