Nodejs String Format format(args)

Method Source Code

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];// w w  w  .  j av a2  s . com
        } 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 result = this;
       if (arguments.length > 0) {
           if (arguments.length == 1 && typeof (args) == "object") {
               for (var key in args) {
                   if (args[key] != undefined) {
                       var reg = new RegExp("({" + key + "})", "g");
                       result = result.replace(reg, args[key]);
           else {
               for (var i = 0; i < arguments.length; i++) {
                   if (arguments[i] != undefined) {
                       var reg = new RegExp("({)" + i + "(})", "g");
                       result = result.replace(reg, arguments[i]);
       return result;
   

2. format(args)

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

3. format(args)

   String.prototype.format = function(args){
     var str = this.toString(),
         result = str.match(/\$[0-9]+/gi),
         mapper = {};
     if(args.length < result.length)
       throw new Error("Index out of range.");
     for(var i = 0; i < result.length; i++){
       mapper[result[i]] = args[parseInt(result[i].replace("$", ""), 10)]
     for(var i = 0; i < result.length; i++){
       str = str.replace(result[i], mapper[result[i]]);
     return str; 
   };
   

4. format(args)

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

5. format(args)

   function valPhone(phoneNumber) {
       if (!/^(13[0-9]|14[0-9]|15[0-9]|18[0-9])\d{8}$/i.test(phoneNumber)) {
           return false;
       } else {
           return true;
   String.prototype.format = function(args) {
       if (arguments.length>0) {
   ...
   

6. format(args)

   'use strict';
   String.prototype.format = function (args) {
       if (arguments.length>0) {
           var result = this;
           console.log(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]);
   ...
   

7. format(args)

   String.prototype.format = function(args)
       var result = this;
       if (arguments.length > 0)
           var reg;
           if (arguments.length == 1 && typeof(args) == "object")
               for (var key in args)
   ...
   

8. format(args)

   String.prototype.format = function (args) {
       var newStr = this;
       for (var key in args) {
           newStr = newStr.replace('{' + key + '}', args[key]);
       return newStr;
   

9. format(args, index)

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