JavaScript: Working with Set

Set data structure is used to store unique elements.

Syntax

new Set([iterable]);

Example

var countries =  new Set();

Example 1

HelloWorld.js

var countries =  new Set();

countries.add("India");
countries.add("Australia");
countries.add("Canada");
countries.add("Germany");

for(var key of countries){
  console.log(key);
}

Output

India

Australia

Canada

Germany

Example 2

HelloWorld.js

var arr = ["India", "Australia"];

var countries =  new Set(arr);

countries.add("Canada");
countries.add("Germany");

for(var key of countries){
  console.log(key);
}

Output

India

Australia

Canada

Germany

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