meanMode.js

// Using the JavaScript language, have the function MeanMode(arr) take the array of numbers stored in arr and return 1 if 
// the mode equals the mean, 0 if they don't equal each other (ie. [5, 3, 3, 3, 1] should return 1 because the mode (3) equals 
// the mean (3)). The array will not be empty, will only contain positive integers, and will not contain more than one mode.

// Input = 1, 2, 3Output = 0
// Input = 4, 4, 4, 6, 2Output = 1

function MeanMode( arr ) {
  var sum = 0;
  arr.forEach( function ( el, idx, ary ) {
    sum += el;
  });
  var mean = parseInt( sum / arr.length );
  var mode = arr.filter( function ( el ) {
    return el == mean;
  });
  return mode.length > 1 ? 1 : 0;
}