30-seconds-of-code/snippets_archive/squareSum.md

squareSum

Squares each number passed into it and then sums the results together.

Use Array.prototype.reduce() to iterate over numbers and to declare an accumulater. Use Math.pow() to calculate power of each number and add all numbers into acculmulator.

const squareSum = (arr) => arr.reduce((squareSum, number) =>
	squareSum + Math.pow(number, 2), 0);

squareSum([1, 2, 2]); // 9