Nodejs String Format format(args)

Method Source Code

'use strict';//from   w  w  w.  java2  s  . c om

String.prototype.format = function (args) {
    var str = this;
    return str.replace(String.prototype.format.regex, function(item) {
        var intVal = parseInt(item.substring(1, item.length - 1));
        var replace;
        if (intVal >= 0) {
            replace = args[intVal];
        } else if (intVal === -1) {
            replace = "{";
        } else if (intVal === -2) {
            replace = "}";
        } else {
            replace = "";
        }
        return replace;
    });
};

String.prototype.format.regex = new RegExp("{-?[0-9]+}", "g");

Related

1. format(args)

   String.prototype.format = function(args){
       var this_string = '';
       for (var char_pos = 0; char_pos < this.length; char_pos++) {
           this_string = this_string + this[char_pos];
       for (var key in args) {
           var string_key = '{' + key + '}';
           this_string = this_string.replace(new RegExp(string_key, 'g'), args[key]);
       return this_string;
   };
   

2. format(args)

   String.prototype.format = function(args) {
       var result = this;
       if (arguments.length < 1) {
           return result;
       var data = arguments;      
       if (arguments.length == 1 && typeof (args) == "object") {
           data = args;
       for (var key in data) {
           var value = data[key];
           if (undefined != value) {
               result = result.replace("{" + key + "}", value);
       return result;
   

3. format(args)

   String.prototype.format = function(args) {
     return this.replace(/{([^{}]*)}/g, function (fullMatch, subMatch) {
       var value = args[subMatch];
       return (typeof value === 'string' || typeof value === 'number') ? value : fullMatch;
     });
   };
   

4. format(args)

   String.prototype.format = function (args) {
     var str = this;
     return str.replace(String.prototype.format.regex, function(item) {
       var intVal = parseInt(item.substring(1, item.length - 1));
       var replace;
       if (intVal >= 0) {
         replace = args[intVal];
       } else if (intVal === -1) {
         replace = "{";
   ...
   

5. format(args)

   String.prototype.format = function(args) { 
     if (arguments.length>0) {
       var result = this; 
       if (arguments.length == 1 && typeof (args) == "object") { 
         for (var key in args) { 
           var reg=new RegExp ("({"+key+"})","g"); 
           result = result.replace(reg, args[key]); 
       } else { 
   ...
   

6. format(args)

   String.prototype.format = function (args) {
       'use strict';
       var str = this;
       return str.replace(String.prototype.format.regex, function (item) {
           var intVal = parseInt(item.substring(1, item.length - 1));
           var replace;
           if (intVal >= 0) {
               replace = args[intVal];
           } else if (intVal === -1) {
   ...
   

7. format(args)

   String.prototype.format = function(args) {
       var result = this;
       if (arguments.length < 1) {
           return result;
       var data = arguments; 
       if (arguments.length == 1 && typeof (args) == "object") {
           data = args;
       for ( var key in data) {
           var value = data[key];
           if (undefined != value) {
               result = result.replaceAll("\\{" + key + "\\}", value);
       return result;
   

8. format(args)

   String.prototype.format = function (args) {
     var str = this;
     return str.replace(String.prototype.format.regex, function(item) {
       var intVal = parseInt(item.substring(1, item.length - 1));
       var replace;
       if (intVal >= 0) {
         replace = args[intVal];
       } else if (intVal === -1) {
         replace = "{";
   ...
   

9. format(args)

   'use strict';
   String.prototype.format = function (args) {
     if (arguments.length > 0) {
       var result = this;
       if (arguments.length == 1 && typeof (args) == "object") {
         for (var key in args) {
           result = result.replace(new RegExp("({" + key + "})", "g"), args[key]);
       else {
         for (var i = 0; i < arguments.length; i++) {
           if (arguments[i] == undefined) {
             return "";
           else {
             var reg = new RegExp("({[" + i + "]})", "g");
             result = result.replace(reg, arguments[i]);
       return result;
     else {
       return this;
   };