Nodejs String Format format()

Method Source Code

String.prototype.format = function (){
   var values = [].slice.call(arguments, 0, arguments.length),
       idx, //from www  .  j av  a2 s  . co m
       length = values.length,
       regex, 
       str = this;
   
   if(str.match(/\{\d+\}/g).length !== length){
      throw{
         name: 'ArgumentMissMatch',
         message: 'The numbers of placeholders and values are not the same'
      };
   }

    for(idx = 0; idx < length; idx += 1){
        regex = new RegExp(['\\\{', idx, '\\\}'].join(''), 'ig');
        str = str.replace(regex, values[idx]);
    }

    return str;
};

Related

1. format()

   String.prototype.format = function(){    
     var re_all = /{(\d+)?(:(\d+)?(.\d+?f))?}/g;
     var re_index = /(\d+):/;
     var re_before = /(\d+)\./;
     var re_after = /\.(\d+)/;
     var cur = this;
     var matches = cur.match(re_all);
     if (arguments.length > matches){
       console.log("Too many arguments!");
   ...
   

2. format()

   String.prototype.format = function() {
     var txt = this;
     var i = arguments.length;
     var replaceTokens = function(txt, key, value) {
       return txt.replace(new RegExp('\\{' + key + '\\}', 'gm'), value);
     };
     if(i > 0 && typeof(arguments[0]) == "object") { 
       for(var key in arguments[0]) {
         txt = replaceTokens(txt, key, arguments[0][key]);
   ...
   

3. format()

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

4. format()

   String.prototype.format=function(){
     if(arguments.length==0) return this;
     var args=[], i=0;
     for(;i<arguments.length;i++) args[i]=arguments[i];
     return this.replace(/\%[sSfdDTt\%]/g, function(m){
       if(m=='%%') return '%';
       var v=args.shift();
       switch(m.substr(1,1)){
         case 's': return v.toString();
   ...
   

5. format()

   String.prototype.format=function(){
     if(arguments.length==0) return this;
     var args=[], i=0;
     for(;i<arguments.length;i++) args[i]=arguments[i];
     return this.replace(/\%[sSfdDTt\%]/g, function(m){
       if(m=='%%') return '%';
       var v=args.shift();
       switch(m.substr(1,1)){
         case 's': return v.toString();
   ...
   

6. format()

   'use strict';
   String.prototype.format = function () {
       var args = arguments;
       var unkeyed_index = 0;
       return this.replace(/\{{1,2}(\w*)\}{1,2}/g, function (match, key) {
           if (match.indexOf('{{') !== -1) { 
               return match.replace('{{', '{').replace('}}', '}');
           if (key === '') { 
   ...
   

7. format()

   String.prototype.format = function() {
       var newStr = this, i = 0;
       while (/%s/.test(newStr)) {
           newStr = newStr.replace("%s", arguments[i++])
       return newStr;
   

8. format()

   String.prototype.printf = function (obj) {
     var useArguments = false;
     var _arguments = arguments;
     var i = -1;
     if (typeof _arguments[0] == "string") {
       useArguments = true;
     if (obj instanceof Array || useArguments) {
       return this.replace(/\%s/g,
   ...
   

9. format()

   String.prototype.format = function () {
       'use strict';
       var newString = this;
       function replace(string, search, replacement) {
           return string.replace(new RegExp(search.replace('{', '\\{').replace('}', '\\}'), 'g'), replacement.toString());
       if (arguments[0] !== 'undefined') {
           switch (typeof arguments[0]) {
               case 'object':
   ...