How can I edit the value of an array

Question

I have an example:

var A = [{
  key: "iphone",
  value: "American"
}, {
  key: "sony",
  value: "Japan"
}]

I want to do this action:

B=[{value:"American"},{value:"Japan"}]

How can I do this? Help me.

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Possible duplicate of [How to remove properties from an object array?](https://stackoverflow.com/questions/37222885/how-to-remove-properties-from-an-object-array) — Sebastian Simon, Feb 23 '18 at 02:15

Sajeetharan · Answer 1 · 2018-02-23T01:53:02.800

2

Use Array.map and return a new Object with the value field,

DEMO

var A =[{key:"iphone",value:"American"},{key:"sony",value:"Japan"}] ;

var result = A.map(d => ({ value: d.value }));
console.log(result);

edited Feb 23 '18 at 01:53

answered Feb 23 '18 at 01:41

Sajeetharan

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Using a single liner implied return would be preferable here – Sterling Archer Feb 23 '18 at 01:50
var A = [{ key: "iphone", value1: "American1", value2:""American2", value3:""American3", value4:""American4", }, { key: "sony", value1: "japan1", value2:""japan2", value3:""japan3", value4:""japan4", }] ==> B = [{ value1: "American1", value2:""American2", value3:""American3", value4:""American4", }, { value1: "japan1", value2:""japan2", value3:""japan3", value4:""japan4", }] can i delete "key" – bechin Feb 23 '18 at 01:54

score 1 · Answer 2 · edited Feb 23 '18 at 01:50

1

var B = A.map(function(obj) { return { value: obj.value }; });

or

var B = A.map(obj => ({ value: obj.value }));

edited Feb 23 '18 at 01:50

P.S.

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answered Feb 23 '18 at 01:43

Raith

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Sorry, forgot parentheses around the fat arrow when returning an object. Was that why you down-voted? – Raith Feb 23 '18 at 01:46
Thanks @CommercialSuicide but you edit broke the solution. Edited back. – Raith Feb 23 '18 at 01:52
Sorry, my correction was wrong, I restored the original solution and gave upvote – P.S. Feb 23 '18 at 01:55

score 0 · Answer 3 · answered Feb 23 '18 at 02:18

Maybe you prefer this more readable syntax?

function myObjectConverter (inputObject) {
  var outputObject = {};
  // ignore the key property
  outputObject.Country1 = inputObject.value1;
  outputObject.Country2 = inputObject.value2;
  outputObject.Country3 = inputObject.value3;
  outputObject.Country4 = inputObject.value4;
  // transfer any other items with new names
  return outputObject;
}

var B = A.map(myObjectConverter);

How can I edit the value of an array

3 Answers3