altcaps.js

function altcaps(words) {
  const letters = words.toString('utf8')
  const methods = ['Upper', 'Lower']
  var idx = 0
  var midx = (Math.random() * 100)|0
  var newstring = ''
  var letter
  for (; idx < letters.length; idx++) {
    letter = letters[idx]
    newstring += (letter.match(/\s/))
      ? letter
      : letter['to' + methods[midx++ % 2] + 'Case']()
  }
  return newstring
}

if (!module.parent) {
  const fs = require('fs')
  const path = require('path')
  const swords = fs.readFileSync(path.join(__dirname, 'inspirational-quote.txt'))
  console.log(altcaps(swords))
}