Exercise

Background: Comparing Two Sets

Remember that for two sets to be equal, they simply have to contain the same elements - and it doesn't matter what order they're in. That's how Sets are defined according to the Set Abstract Data Type. Unfortunately, in JavaScript, comparing two Sets using === or == will not produce the correct result. This is because, in JavaScript, two different objects can never be equal.

var first = new Set([1, 2, 3]);
var second = new Set([3, 2, 1]);
// These sets are equal. However, JavaScript gets it wrong:
console.log(first === second); //Prints false

Try it here!

Therefore, in JavaScript, you have to write your own function to determine if sets are equal.

Task: Write a function that takes two Sets and determines whether they are equal.

Example usage:

// Here are two sets to compare
var first = new Set([1, 2, 3]);
var second = new Set([3, 2, 1]);

// areEqual() is a function that needs to be written that returns true or false
var areTheSame = areEqual(first, second);
console.log(areTheSame); //Should print true

// Try calling areEqual() with a third set, which is different
var third = new Set([1, 2, 3, 4]);

// Use areEqual() to compare the first and third sets
areTheSame = areEqual(first, third);
console.log(areTheSame); //Should print false

Your job is to write and implement the areEqual() function.

• Given two sets, print out whether they are equal.
• Make sure to use forEach() and has()

Start with this JSBin!

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Solution Code