http://www.freecodecamp.com/patrickcurl 's solution for Bonfire: Spinal Tap Case

bonfire-spinal-tap-case.js

// Bonfire: Spinal Tap Case
// Author: @patrickcurl
// Challenge: http://www.freecodecamp.com/challenges/bonfire-spinal-tap-case
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function spinalCase(str) {

  return str.replace(/([a-z])([A-Z])/g, '$1 $2').replace(/\s+|_+/g, '-').toLowerCase();

}

spinalCase('This Is Spinal Tap');