Rediscovering JavaScript: ES6, ES7 & ES8/

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Solution Review: Injecting a Method

Solution Review: Injecting a Method

Here’s the solution to the injecting a method challenge given in the previous lesson.

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Solution

Let’s take a look at the solution code given below.

Node.js
'use strict';
Set.prototype.combine = function(otherSet) {
  const copyOfSet = new Set(this);
  
  for(const element of otherSet) {
    copyOfSet.add(element);
  }
  
  return copyOfSet;
};
const names1 = new Set(['Tom', 'Sara', 'Brad', 'Kim']);
const names2 = new Set(['Mike', 'Kate']);
const combinedNames = names1.combine(names2);

Explanation

Let’s dive into the solution code.

First of all, we need to make a new Set element in which there will be a combination of two sets. ...