Nodejs String Format format(args)

Method Source Code

/**//from   w w w.j av a2  s.  co m
 * http://stackoverflow.com/questions/4974238/javascript-equivalent-of-pythons-format-function
 */
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;
};

Related

1. format(args)

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

2. format(args)

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

3. format(args)

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

4. format(args)

   String.prototype.format = function (args) {
       var regex = /{-?[0-9]+}/g;
       var str = this;
       return str.replace(regex, function(item) {
           var intVal = parseInt(item.substring(1, item.length - 1));
           var replace;
           if (intVal >= 0) {
               replace = args[intVal];
           } else {
   ...
   

5. format(args)

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

6. 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;
   

7. 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;
     });
   };
   

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)

   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 { 
   ...