Nodejs Utililty Methods String Capitalize

String.prototype.capitalizeFirstLetter = function() {
  return this.charAt(0).toUpperCase() + this.slice(1);
};
String.prototype.capitalizeString = function() {
  return this.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
};

String.prototype.capitalizeOnlyFirstLetter = function() {
    return this.charAt(0).toUpperCase() + this.slice(1)

String.prototype.capitalize = String.prototype.capitalize || function(){
    return this.replace( /(^|\s)([a-z])/g , function(m,p1,p2){ return p1+p2.toUpperCase(); } );
};

String.prototype.capitalize = String.prototype.capitalize || function() {
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
};

String.prototype.capitalizeWords = function () {
    return $.map(this.split(" "), function (e) { e.capitalize(); }).join(" ");
};

String.prototype.capitalizeWords = function() {
  var words = this.split(/\s+/), 
    wordCount = words.length,
    i,
    newWords = [];
  for (i = 0; i < wordCount; i++) {
    newWords.push(words[i].capitalize());
  return newWords.join(' ');  
...

String.prototype.capitalize_all = function() {
  var words = [];
  this.split(' ').forEach(function(word) {
    words.push( word.charAt(0).toUpperCase() + word.slice(1) );
  });
  return words.join(" ");
String.prototype.capitalize_first = function() {
  return this.charAt(0).toUpperCase() + this.slice(1);
...

String.prototype.capitalize = function capitaliseFirstLetter() {
    return this.charAt(0).toUpperCase() + this.slice(1);
};

String.prototype.capitalize = function capitalize() {
  return this[0].toUpperCase() + this.slice(1);
};

String.prototype.capitalize  = jCube.String.capitalize  = function () {
  return this.charAt(0).toUpperCase() + this.substring(1).replace( /\s[a-z]/g, function(s){ return s.toUpperCase(); });