The most efficient way to convert a javascript set to string

Question

Is there a way of converting a Set to a String directly (without first converting the set to an array)? I have gone through the documentation at Mozilla and I feel they may be a way of doing it. This is what I do:

let myset = new Set();
myset.add(3);
myset.add(" Wise ");
myset.add(" Men ");

let setStr = myset.toString();
let setArrStr = Array.from(myset).toString();

console.log("Set to String: " + setStr );  //"Set to String: [object Set]"
console.log("Set to Array to String: " + setArrStr);  // "Set to Array to String: 3, Wise , Men "

What do you mean by "doing it"? Do you want to print every element of the set separated by a comma? — str, Dec 30 '17 at 20:22
Thanks @Nina I just want it converted to a string directly. Must it be converted to an array first? — Nditah, Dec 30 '17 at 20:23
I'm sorry to say, but this seems to be a dublicate with pretty good answers already: https://stackoverflow.com/questions/20069828/how-to-convert-set-to-array — Mindaugas Bernatavičius, Dec 30 '17 at 20:23
Possible duplicate of [How to convert Set to Array?](https://stackoverflow.com/questions/20069828/how-to-convert-set-to-array) — Mindaugas Bernatavičius, Dec 30 '17 at 20:24
@MindaugasBernatavičius I dont think so. Convert Set => String is not the same as Convert Set to Array as you cited. — Nditah, Dec 30 '17 at 20:26
You need array to get string or loop over values(). Shortest is `[...myset].join()` — charlietfl, Dec 30 '17 at 20:26

theAlexandrian · Answer 1 · 2018-02-16T17:47:40.010

1

You can convert to string directly like so:

let string = "";
let myset = new Set();
myset.add(3);
myset.add(" Wise ");
myset.add(" Men ");

myset.forEach(value => string += value);
console.log(string); // → "3 Wise  Men "

Hope you got your answer.

edited Feb 16 '18 at 17:47

answered Dec 31 '17 at 10:33

theAlexandrian

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The most efficient way to convert a javascript set to string

1 Answers1