Nodejs String Format format(options)

Method Source Code

/* Problem 1. Format with placeholders

Write a function that formats a string. The function should have placeholders, as shown in the example
Add the function to the String.prototype
*//*from   w w  w. j  a v  a  2  s  . c  o  m*/

String.prototype.format = function (options) {

    var regex,
        input = this;

    for (var key in options) {
        regex = new RegExp('#{' + key + '}', 'g');
        input = input.replace(regex, options[key]);
    }

    return input;
}

console.log('Original text is: Hello, there! Are you #{name}? and Object is: { name: \'John\' }')
console.log('Changed text is: ' + 'Hello, there! Are you #{name}?'.format({ name: 'John' }));

console.log('Original text is: My name is #{name} and I am #{age}-years-old).format(options) and object is: {name: \'Johnny\', age: 21} ');
console.log('Changed text is: ' + 'My name is #{name} and I am #{age}-years-old)'.format({name: 'Johnny', age: 21}));

Related

1. format(options)

   String.prototype.format = function (options) {
       var option,
           regex,
           formatted = this;
       for (option in options) {
           regex = new RegExp('#{' + option + '}', 'g');
           formatted = formatted.replace(regex, options[option]);
       return formatted;
   ...
   

2. format(options)

   String.prototype.format=function(options) {
       var string = this;
       for (var i in options) {
           var pattern = '#{' + (i) + '\\}';
           var regex = new RegExp(pattern, 'g');
           string = string.replace(regex, options[i]);
       return string;
   var options = {name: 'John'};
   console.log('Hello, there! Are you #{name}?'.format(options));
   var options = {name: 'John', age: 13};
   console.log('My name is #{name} and I am #{age}-years-old'.format(options));
   

3. format(options)

   var phraseOne = 'Hello, there! Are you #{name}?';
   var phraseTwo = 'My name is #{name} and I am #{age}-years-old';
   String.prototype.format = function (options) {
       var option,
           fullString = this;
       for (option in options) {
           var placeholder = /#\{\w+}/;
           fullString = fullString.replace(placeholder, options[option]);
       return fullString;
   };
   console.log(phraseOne.format({name: 'John'}));
   console.log(phraseTwo.format({name: 'John', age: 13}));
   

4. format(options)

   var options = {name: 'John'};
   String.prototype.format = function (options) {
       var result = this;
       function getNameOfPlaceholder(startIndex, text) {
           var name = '';
           for (var i = startIndex + 1; text[i] != '}'; i++) {
               name += text[i];
           return name;
   ...
   

5. format(options)

   String.prototype.format = function(options) {
     var prop,
     regex,
     result = this;
     for (prop in options) {
       regex = RegExp('#\{' + prop + '\}', 'gi');
       result = result.replace(regex, options[prop]);
     return result;
   ...
   

6. format(options)

   "use strict";
   var formatPlace = function (options, str) {
       function replacer(match, i) {
           i = i.substring(2, i.length - 1);
           return options[i];
       return str.replace(/(#{[^{}]+})/gm, replacer);
   };
   String.prototype.format = function(options){
   ...
   

7. format(options)

   String.prototype.format = function(options) {
       var prop,
           result = this;
       for (prop in options) {
           result = result.replace(new RegExp('#{' + prop + '}', 'g'), options[prop]);
       return result;
   };
   var options01 = { name: 'John' };
   ...
   

8. format(opts)

   String.prototype.format = function(opts) {
       var option,
           regex,
           formatted = this;
       for (option in opts) {
           regex = new RegExp('#{' + option + '}', 'g');
           formatted = formatted.replace(regex, opts[option]);
       return formatted;
   ...
   

9. format(opts)

   String.prototype.format = function(opts) {
       var source = this,
           data = Array.prototype.slice.call(arguments, 0),
           toString = Object.prototype.toString;
       if (data.length) {
           data = data.length == 1 ?
               (opts !== null && (/\[object Array\]|\[object Object\]/.test(toString.call(opts))) ? opts : data) : data;
           return source.replace(/%\{(.+?)\}/g, function(match, key) {
               var replacer = data[key];
   ...