Create a function that looks through an array (first argument) and returns the first element in the array that passes a truth test (second argument).

finders-keepers.js

function findElement(arr, func) {
  var num = 0;
  //filter the array using the provided function, this will keep anything that returns true in an array;
  num = arr.filter(func);
  //return the first element in the new array.
  return num[0];
}

findElement([1, 2, 3, 4], function(num){ return num % 2 === 0; });