forEach < Set < JavaScript

The forEach() method of a Set executes a provided function once for each value in this set, in insertion order.

    
    const numbers = new Set([2, 3, 5, 7]);
	const primes = [];

	function square(number) {
  		const sq = number * number;
        primes.push(sq);
    }

    numbers.forEach(square)

    primes.forEach(function(number) {
        console.log(number);
    });
    // 4
    // 9
    // 25
    // 49