Nodejs String Format format()

Method Source Code

String.prototype.format = function() {
   var args = arguments;
   return this.replace(/\{\{|\}\}|\{(\d+)\}/g, function(m, n) {
      if (m == "{{") {
         return "{";
      }//w w w.  j a  v  a2 s. c  o m
      if (m == "}}") {
         return "}";
      }
      return args[n];
   });
};

Related

1. format()

   String.prototype.format = function() {
     var args = arguments;
     return this.replace(/\{\{|\}\}|\{(\d+)\}/g, function(m, n) {
       if (m == "{{") return "{";
       if (m == "}}") return "}";
       return args[n];
     });
   };
   

2. format()

   String.prototype.format = function () {
       "use strict";
       var args = [].slice.call(arguments);
       return this.replace(/(\{\d+\})/g, function (a) {
           return args[+(a.substr(1, a.length - 2)) || 0];
       });
   };
   

3. format()

   String.prototype.format = function () {
     var args = arguments;
     if (args && args.length > 0) {
       return this.replace(/\{(\d+)\}/g, function (term, index) {
         return args[index] || '';
       });
     return this;
   };
   ...
   

4. format()

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

5. format()

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

6. format()

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

7. format()

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

8. format()

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

9. 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;
   };