Nodejs String Format format()

Method Source Code

/*/*  w w w .j  a v a  2 s  .c  om*/
 * file:          strings.js
 * description:    used to provide C# / Python-style format strings to JS string objects
 * author:          Aaron Stannard
 * created:       8/12/2013
 * last-modified:    8/12/2013
 */

String.prototype.format = function() {
  var args = arguments;
  return this.replace(/{(\d+)}/g, function(match, number) { 
    return typeof args[number] != 'undefined'
      ? args[number]
      : match
    ;
  });
};

Related

1. format()

   String.prototype.format = function() {
       var formatted = this;
       for (var i = 0; i < arguments.length; i++) {
           var regexp = new RegExp('\\{'+i+'\\}', 'gi');
           formatted = formatted.replace(regexp, arguments[i]);
       return formatted;
   };
   

2. format()

   String.prototype.format = function() {
       var txt = this, i = arguments.length; while (i--) {
           txt = txt.replace (
               new RegExp('\\{' + i + '\\}', 'gm'), arguments[i]
           );
       return txt;
   };
   

3. format()

   String.prototype.format = function() {
     var args = arguments;
     return this.replace(/\{(\d+)\}/g, function(match, number) {
       return typeof args[number] != 'undefined' ? args[number] : match;
     });
   };
   

4. format()

   String.prototype.format = function () {
       var args = arguments;
       return this.replace(/{(\d+)}/g, function (match, number) {
           return typeof args[number] != 'undefined' ? args[number] : match;
       });
   };
   

5. format()

   String.prototype.format = function () {
       var str = this;
       for (var i = 0; i < arguments.length; i++) {
           var reg = new RegExp("\\{" + i + "\\}", "gm");
           str = str.replace(reg, arguments[i]);
       return str;
   

6. format()

   String.prototype.format = function () {
     var formatted = this;
     for (var i = 0; i < arguments.length; i++) {
       formatted = formatted.replace(
         RegExp('\\{' + i + '\\}', 'g'), arguments[i]);
     return formatted;
   };
   

7. format()

   String.prototype.format = function() {
       var formattedString = this;
       for (var i = 0; i < arguments.length; i++) {
           var reg = new RegExp('\\{' + i + '\\}', 'gm');
           formattedString = formattedString.replace(reg, arguments[i]);
       return formattedString;
   };
   

8. format()

   String.prototype.format = function() {
       var formatted = this;
       for (var i = 0; i < arguments.length; i++) {
           var regexp = new RegExp('\\{'+(i)+'\\}', 'gi');
           formatted = formatted.replace(regexp, arguments[i]);
       return formatted;
   };
   

9. format()

   String.prototype.format = function() {
       var formatted = this;
       if(arguments.length == 1 && arguments[0] instanceof Object) {
           var args = arguments[0];
           for(var i in args) {
               var regexp = new RegExp('\\{' + i + '\\}', 'gi');
               formatted = formatted.replace(regexp, args[i]);
       } else if(arguments.length > 1) {
   ...