Convert a Javascript `Set` to an array

Question

There doesn't seem to be an easy and elegant way of converting a Javascript Set to an array.

var set = new Set();
set.add("Hello");
set.add("There");
set.add(complexObject);

var setConvertedToArray = convertSetToArray(set);

console.log( setConvertedToArray ); // ["Hello", "There", ►Object ]

A map feels about right, but the Set prototype only has a forEach.

Yuck:

function convertSetToArray(set) {
  var a = [];
  set.forEach( x => a.push(x) ); 
  return a;
}

Anyone know of a nice way to convert a Set to an array?

Or better one [How to convert Set to Array?](http://stackoverflow.com/questions/20069828/how-to-convert-set-to-array) — Tushar, Jan 11 '16 at 03:24

score 12 · Accepted Answer · answered Jan 11 '16 at 03:21

12

Some ways to do it:

[...set];
[...set.keys()];
[...set.values()];
Array.from(set);
Array.from(set.keys());
Array.from(set.values());

answered Jan 11 '16 at 03:21

Oriol

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score 3 · Answer 2 · answered Jan 11 '16 at 03:18

You can use the Array.from() method which returns an array from Array like objects like Set

var set = new Set();
set.add("Hello");
set.add("There");
set.add({});

var setConvertedToArray = Array.from(set);

document.body.innerHTML = setConvertedToArray instanceof Array;

Convert a Javascript `Set` to an array

2 Answers2