30-seconds-of-code/snippets/arrayAverage.md

arrayAverage

Returns the average of an array of numbers.

Use Array.reduce() to add each value to an accumulator, initialized with a value of 0, divide by the length of the array.

const arrayAverage = arr => arr.reduce((acc, val) => acc + val, 0) / arr.length;
// arrayAverage([1,2,3]) -> 2