Nodejs String Format format()

Method Source Code

String.prototype.format = function() {
  var args = arguments;
  return this.replace(/{(\d+)}/g, function(match, number) { 
    return typeof args[number] != 'undefined'
      ? args[number]//from w w  w . j a  v a 2  s  .  c  o m
      : '{' + number + '}'
    ;
  });
};

Related

1. 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;
   };
   

2. 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;
   };
   

3. 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];
     });
   };
   

4. 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;  
   

5. format()

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

7. format()

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

8. format()

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

9. format()

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