Nodejs String Format format()

Method Source Code

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!");
      return cur;
   }else{/*from w  w  w . j a v  a 2s  .  c  o m*/
      for (var i=0; i<arguments.length;i++){
         var match_i = matches[i];
         var arg_index = match_i.match(re_index);
         var arg ; 
         if (arg_index != null){
            arg = arguments[arg_index[1]];
         }else{
            arg = arguments[i];
         }
         var f_after = match_i.match(re_after);
         if (f_after != null){
            var val = f_after[1];
            var pow_val = Math.pow(10,-val);
            arg = arg.toFixed(val);
         }else{
            var f_before = match_i.match(re_before); 
            if (f_before != null){
               var val = f_before[1];
               var pow_val = Math.pow(10,val)
               arg = Math.floor(arg / pow_val)*pow_val;
            }else{
            }
         }
         cur = cur.replace(match_i, arg.toString());
      }
      return cur;   
   }
}

Related

1. format()

   String.prototype.format = function() {
     var source = this;
     for (var i = 0; i <= arguments.length - 1; i++) {       
       var reg = new RegExp("\\{" + i + "\\}", "gm");             
       source = source.replace(reg, arguments[i]);
     return source;
   };
   Date.prototype.format = function (fmt) { 
   ...
   

2. format()

   String.prototype.format = function() {
     var formatted = this;
     for (arg in arguments) {
       formatted = formatted.replace('{' + arg + '}', arguments[arg]);
     return formatted;
   };
   

3. format()

   String.prototype.format = function() {
       var args = arguments;
       return this.replace(/\{(\d+)\}/g,
           function(m, i) {
               return args[i];
           });
   };
   String.prototype.encodeHTML = function () {
       var s = this.valueOf();
   ...
   

4. format()

   String.format = function () {
       var s = arguments[0];
       for (var i = 0; i < arguments.length - 1; i++) {
           var reg = new RegExp("\\{" + i + "\\}", "gm");
           s = s.replace(reg, arguments[i + 1]);
       return s;
   String.prototype.format = function () {
   ...
   

5. format()

   String.prototype.format = function () {
       var args = arguments;
       var reg = /\{(\d+)}/g;
       return this.replace(reg, function (g0, g1) {
           return args[+g1];
       });
   };
   var str = "this is :{0} and {1} , and  {0}".format("arg1","arg2")
   var main = "Scripts/main";
   ...
   

6. 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]);
   ...
   

7. format()

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

8. 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();
   ...
   

9. 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();
   ...