pig latin translator

pig_laitn.js

assert = require "assert"

pigLatin = (s) ->
  words = s.split " "
  words.map(doTranslate).join " "

doTranslate = (w) ->
  latin = "ay"
  remainingWord = w.substring(1)
  firstChar = w[0]
  if /[A-Z]/.test firstChar
    firstChar = w[0].toLowerCase()
    firstWord = remainingWord[0].toUpperCase() + remainingWord.substring(1)
  else
    firstWord = remainingWord
  firstWord + firstChar + latin

assert.equal pigLatin("hello"), "ellohay"
assert.equal pigLatin("hello world"), "ellohay orldway"
assert.equal pigLatin("Hello world"), "Ellohay orldway"