CoffeeScript toTitleCase

toTitleCase.coffee

String::toTitleCase = ->
  # From http://stackoverflow.com/a/6475125/1877527
  str =
    @replace /([^\W_]+[^\s-]*) */g, (txt) ->
      txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase()

  # Certain minor words should be left lowercase unless
  # they are the first or last words in the string
  lowers = [
    "A"
    "An"
    "The"
    "And"
    "But"
    "Or"
    "For"
    "Nor"
    "As"
    "At"
    "By"
    "For"
    "From"
    "In"
    "Into"
    "Near"
    "Of"
    "On"
    "Onto"
    "To"
    "With"
    ]
  for lower in lowers
    lowerRegEx = new RegExp("\\s#{lower}\\s","g")
    str = str.replace lowerRegEx, (txt) -> txt.toLowerCase()

  # Certain words such as initialisms or acronyms should be left
  # uppercase
  uppers = [
    "Id"
    "Tv"
    ]
  for upper in uppers
    upperRegEx = new RegExp("\\b#{upper}\\b","g")
    str = str.replace upperRegEx, upper.toUpperCase()
  str

toTitleCase.js

String.prototype.toTitleCase = function() {
  var lower, lowerRegEx, lowers, str, upper, upperRegEx, uppers, _i, _j, _len, _len1;
  str = this.replace(/([^\W_]+[^\s-]*) */g, function(txt) {
    return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
  });
  lowers = ["A", "An", "The", "And", "But", "Or", "For", "Nor", "As", "At", "By", "For", "From", "In", "Into", "Near", "Of", "On", "Onto", "To", "With"];
  for (_i = 0, _len = lowers.length; _i < _len; _i++) {
    lower = lowers[_i];
    lowerRegEx = new RegExp("\\s" + lower + "\\s", "g");
    str = str.replace(lowerRegEx, function(txt) {
      return txt.toLowerCase();
    });
  }
  uppers = ["Id", "Tv"];
  for (_j = 0, _len1 = uppers.length; _j < _len1; _j++) {
    upper = uppers[_j];
    upperRegEx = new RegExp("\\b" + upper + "\\b", "g");
    str = str.replace(upperRegEx, upper.toUpperCase());
  }
  return str;
};