30-seconds-of-code/average.md at 094c55e3a6f1756a85c0f69ab375eab627fe44e3

Files

atomiks 094c55e3a6 Fix average when passing an array as an argument

2017-12-30 01:41:32 +11:00

Returns the average of an of two or more numbers/arrays.

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

const average = (...arr) => {
  const nums = [].concat(...arr);
  return nums.reduce((acc, val) => acc + val, 0) / nums.length;
};

average([1, 2, 3]); // 2
average(1, 2, 3); // 2