Nodejs String Format format()

Method Source Code

////ww  w  .  jav a 2s  .com
// .net string.format like function
// usage:   "{0} means 'zero'".format("nula") 
// returns: "nula means 'zero'"
// place holders must be in a range 0-99.
// if no argument given for the placeholder, 
// no replacement will be done, so
// "oops {99}".format("!")
// returns the input
// same placeholders will be all replaced 
// with the same argument :
// "oops {0}{0}".format("!","?")
// returns "oops !!"
//
String.prototype.format = function () {
   var args = arguments; 
   return this.replace( /\{(\d|\d\d)\}/g, 
   function ( $0 ) {
      var idx = $0.match(/\d+/);
      return args[idx] ? args[idx] : $0 ;
   } );
}

"T123{0}T{0}".format("A","B")
/*
T123ATA
*/

Related

1. format()

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

2. format()

   function extend(obj, src) {
       for (var key in src) {
           if (src.hasOwnProperty(key)) obj[key] = src[key];
       return obj;
   String.prototype.format = function () {
     var i = 0, args = arguments;
     return this.replace(/{}/g, function () {
   ...
   

3. format()

   String.prototype.format = function() {
       var args = Array.prototype.slice.call(arguments),
           format = this,
           match;
       if (args.length === 1 && typeof args[0] === "object") {
           args = args[0];
       for (var i = 0; match = /{(\d+|\w+)?}/gm.exec(format); i++) {
           var key = match[1];
   ...
   

4. format()

   String.prototype.format = function () {
       var s = this;
       for (var i = 0; i < arguments.length; i++) {
           var reg = new RegExp("\\{" + i + "\\}", "gm");
           s = s.replace(reg, 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;
   };
   function selectText() {
   ...
   

6. 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;
   };
   function selectElementText(el) {
   ...
   

7. 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];
     });
   };
   String.prototype.html = function() {
     return $('<i></i>').text(this).html();
   };
   String.prototype.htmlWithLines = function() {
     var text = this.html();
     return text.replace(/\n/g, '<br/>');
   function loc () {
     var code = arguments[0];
     var text = l[code];
     if (text != null) {
       var params = []  ;
       for (var i = 1 ; i < arguments.length ; i++) {
         params.push(arguments[i]);
       return text.format (params);
     } else {
       return "##" + code + "##";
   

8. format()

   function generateUUID(){
       var d = new Date().getTime();
       if(window.performance && typeof window.performance.now === "function"){
           d += performance.now(); 
       var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
           var r = (d + Math.random()*16)%16 | 0;
           d = Math.floor(d/16);
           return (c=='x' ? r : (r&0x3|0x8)).toString(16);
   ...
   

9. format()

   String.prototype.format = function() {
       var formatted = this;
       for (var i = 0; i < arguments.length; i++) {
           var regexp = new RegExp('\\{'+i+'\\}', 'gi');
           formatted = formatted.replace(regexp, arguments[i]);
       return formatted;
   };
   function lz(n){
   ...