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 — Desert Rose
– Desert Rose, Commented Feb 16, 2016 at 7:40

eltonkamami · Accepted Answer · 2016-02-16 07:13:56Z

1

you can use the map function

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

answered Feb 16, 2016 at 7:13

eltonkamami

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Altenrion · Accepted Answer · 2016-02-16 07:19:23Z

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, 2016 at 7:19

Altenrion

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answered Feb 16, 2016 at 7:14

Divyesh Savaliya

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Nishant Jain · Accepted Answer · 2017-12-09 15:58:29Z

0

A simpler way would be

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

answered Dec 9, 2017 at 15:58

Nishant Jain

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