Nodejs String Format format()

Method Source Code

/**//from  w w  w  .j  av a  2 s.c o  m
 * Format a string using placeholders like `{0}`.
 *
 * @example  '{0}, hello {1} world!'.format('Oh', 'beautiful')
 *           'Oh, hello beautiful world!'
 *
 * @return   {String} Returns the new string.
 */

String.prototype.format = String.prototype.format || function () {
  var string = this

  for (var i = 0, j = arguments.length; i < j; i++) {
    string = string.replace(new RegExp('\\{' + i + '\\}', 'gm'), arguments[i])
  }

  return string
}

Related

1. 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;
   };
   

2. format()

   'use strict';
   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;
   };
   ...
   

3. format(options)

   String.prototype.format = String.prototype.f = function(options) {
       options = options ? options : [];
       if (typeof options != "object") options = [options];
       var s = this,
           i = options.length;
       while (i--) {
           s = s.replace(new RegExp('\\{' + i + '\\}', 'gm'), options[i]);
       return s;
   ...
   

4. format()

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

5. format()

   String.prototype.format = String.prototype.format ||
   function () {
       var str = this.toString();
       if (arguments.length) {
           var t = typeof arguments[0];
           var key;
           var args = ("string" === t || "number" === t) ?
               Array.prototype.slice.call(arguments)
               : arguments[0];
   ...
   

6. format()

   String.prototype.format = String.prototype.format || function format() {
       var args = arguments;
       return this.replace(/\{(\d+)\}/g, function($0, $1) {
           return args[+$1];
       });
   };
   

7. format(object)

   String.prototype.format = function format(object) {
       let parsed = this;
       for (const option in object) {
           if ({}.hasOwnProperty.call(object, option)) {
               const regex = new RegExp(`#{${option}}`, 'g');
               parsed = parsed.replace(regex, object[option]);
       return parsed;
   ...
   

8. format()

   function format () {
     if (arguments.length === 0) return this;
     var iter;
     if (arguments.length > 1) { 
       iter = arguments;
     } else {
       iter = arguments[0];
     var ret = this;
   ...
   

9. format()

   (function(){
   function format () {
     if (arguments.length === 0) return this;
     var iter;
     if (arguments.length > 1) { 
       iter = arguments;
     } else {
       iter = arguments[0];
     var ret = this;
     for (var i in iter) {
       ret = ret.replace('{'+i+'}', iter[i]);
     return ret;
   String.prototype.format = format;
   })();