Covert each key and value in to array

Question

How covert or add each key and value into separate array.

Now

var arr = {
  "3/10/2017": 52,
  "3/11/2017": 58,
  "3/12/2017": 70,
  "3/13/2017": 76
}

Result should be

var arr = [
  ["3/10/2017", 52],
  ["3/11/2017", 58],
  ["3/12/2017", 70],
  ["3/13/2017", 76]
]

Thank you

["3/10/2017": 52] isn't valid JavaScript. Did you mean {"3/10/2017": 52} instead? — James Donnelly
– James Donnelly, Commented Apr 10, 2017 at 9:32
If you wanted [["3/10/2017", 52],... - then it's as easy as Object.entries(arr) - however, what you want is invalid — Jaromanda X
– Jaromanda X, Commented Apr 10, 2017 at 9:34

kind user · Accepted Answer · 2017-04-10 09:44:07Z

4

["3/13/2017": 76] is actually invalid array, but you could replace : with e.g. comma , or just push it to every array as an object.

var arr = {
  "3/10/2017": 52,
  "3/11/2017": 58,
  "3/12/2017": 70,
  "3/13/2017": 76
},
res = Object.keys(arr).map(v => new Array(v, arr[v])),
res2 = Object.keys(arr).map(v => new Array({[v]: arr[v]}));

console.log(JSON.stringify(res, 2, null));
console.log(JSON.stringify(res2, 2, null));

edited Apr 10, 2017 at 9:44

answered Apr 10, 2017 at 9:34

kind user

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2 Comments

Mihai Alexandru-Ionut Over a year ago

This is because IE does not support arrow functions.

kind user Over a year ago

@ArunKumarM And that was the reason to unaccept my answer? Note that you didn't mention anything about compatibility with IE. You could just tell me it instead of unaccepting my answer. This is just wrong and you have disappointed me.

Jaromanda X · Accepted Answer · 2017-04-10 09:37:27Z

3

using Object.entries

var arr = {
  "3/10/2017": 52,
  "3/11/2017": 58,
  "3/12/2017": 70,
  "3/13/2017": 76
};

arr = Object.entries(arr);
console.log(JSON.stringify(arr));

answered Apr 10, 2017 at 9:37

Jaromanda X

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2 Comments

kind user Over a year ago

Object.entries method is unfortunately not supported by IE or Opera. At all.

Jaromanda X Over a year ago

Polyfills change that sad state of affairs

Mihai Alexandru-Ionut · Accepted Answer · 2017-04-10 09:36:08Z

2

You should use map method in combination with Object.keys().map method accepts a callback function which is applied to every item in the array.

var arr = {
  "3/10/2017": 52,
  "3/11/2017": 58,
  "3/12/2017": 70,
  "3/13/2017": 76
};
console.log(Object.keys(arr).map(function(item){
    return [item,arr[item]];
}));

answered Apr 10, 2017 at 9:36

Mihai Alexandru-Ionut

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