http://www.freecodecamp.com/hallaathrad 's solution for Bonfire: Where do I belong

bonfire-where-do-i-belong.js

fire-where-do-i-belong.js
// Bonfire: Where do I belong
// Author: @hallaathrad
// Challenge: http://www.freecodecamp.com/challenges/bonfire-where-do-i-belong
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function where(arr, num) {
  // Find my place in this sorted array.
  arr.push(num);
  return arr.sort(function(x,y){return x<y?-1:x>y?1:0;}).indexOf(num);
}

where([40, 60], 50);

Return the lowest index at which a value (second argument) should be inserted into an array (first argument) once it has been sorted.