How to convert Associative array to a simple string array of values in javascript

Question

So I want to convert this array retrieved from a database to just an array of string values:

Array:[{"userid":"c"},{"userid":"d"}]

Expected results:["c","d"]

Possible duplicate of [Iterate through associative array using sequential for loop](http://stackoverflow.com/questions/15809366/iterate-through-associative-array-using-sequential-for-loop) — Desert Rose, Feb 16 '16 at 07:40

score 1 · Accepted Answer · answered Feb 16 '16 at 07:13

1

you can use the map function

result = myArray.map(function(item){ return item.userid; })

answered Feb 16 '16 at 07:13

eltonkamami

5,134
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score 0 · Answer 2 · edited Feb 16 '16 at 07:19

0

If you need this conversions on javascript side, you should keep in mind, that if there would be a lot of items, the performance might be rather bad. May be it would be better to change logick of gathering the first array.

For conversion you could try this:

Data = [{"userid":"c"},{"userid":"d"}];
arr = [];
for(i in Data){
   arr.push(Data[i].userid);
}
console.log(arr);

edited Feb 16 '16 at 07:19

Altenrion

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35

answered Feb 16 '16 at 07:14

Divyesh Savaliya

2,692
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score 0 · Answer 3 · answered Dec 09 '17 at 15:58

0

A simpler way would be

const results = myArray.map(item => item.userId);

answered Dec 09 '17 at 15:58

Nishant Jain

197
1
9

How to convert Associative array to a simple string array of values in javascript

3 Answers3