Custom forEach() Exercise

Add a custom forEach() function to Array.prototype, then test it against isEven() and square()

• forEach(even):
  • [12,453,68,821,-6,0,527].forEach(isEven) ->
    • 12 is even
    • 453 is not even
    • 68 is even
    • 821 is not even
    • -6 is even
    • 0 is even
    • 527 is not even
• forEach(squared):
  • [12,453,68,821,-6,0,527].forEach(squared) ->
    • 12 squared is 144
    • 453 squared is 205209
    • 68 squared is 4624
    • 821 squared is 674041
    • -6 squared is 36
    • 0 squared is 0
    • 527 squared is 277729