mathball/lib/average/index.js

A JavaScript library for Competitive Programming

'use strict';

/* Function: avg() */

var validate = require('../validation/number-array');

module.exports = function (arr) {
   validate(arr, 'avg');
   var sum = arr.reduce(function (prev, next) {
      return prev + next;
   }, 0);
   return Number((sum / arr.length).toFixed(5));
};