Nodejs String Starts With startsWith(value)

Method Source Code

/*/*from   w  w  w . j  a v a2 s .c om*/
*    All the functions have been checked with JSLint and modified accordingly
*    
*    I have not documented much as the names of the prototype functions should 
*    speak for themselves.
*/

String.prototype.startsWith = function (value) {
    "use strict";
    var length = this.substring(0, value.length),
        startsWith = false;
    if (length === value && value !== "" && value !== 'undefined') {
        startsWith = true;
    }
    return startsWith;
};

Related

1. startsWith(text)

   String.prototype.startsWith = function(text) {
       return text != null && this.indexOf(text) == 0;
   };
   

2. startsWith(value)

   String.prototype.startsWith=  function(value)
       if (value.length <= this.length)
           return this.substring(0, value.length) == value;
       return false;
   };
   

3. startsWith(value)

   String.prototype.startsWith = function (value) {
       'use strict';
       return this.lastIndexOf(value, 0) === 0;
   };
   

4. startsWith(value)

   String.prototype.startsWith = function(value) {
     if (!value)
       return false;
     if (value.length > this.length)
       return false;
     return value === this.substring(0, value.length);
   };
   String.prototype.formatForUrl = function () {
     return this.replace(/[^a-z0-9]/gi, '-').toLowerCase();
   ...
   

5. startsWith(value)

   String.prototype.startsWith = function (value) {
     if (value == undefined || typeof (value) != "string")
       return false;
     if (value.length == 0)
       return true;
     return this.substring(0, value.length) == value;
   };
   

6. startsWith(x)

   String.prototype.startsWith = function (x) {
     return this.indexOf(x) === 0;
   };
   

7. startsWithAny(strings)

   String.prototype.startsWithAny = function(strings){
       for (var i = 0; i < strings.length; i++)
           if (this.startsWith(strings[i]))
               return true;
       return false;
   String.prototype.startsWith = function(str){
       return (this.indexOf(str) === 0);
   

8. startsWithLetter()

   String.prototype.startsWithLetter = function() {
       return this[0].toLowerCase() !== this[0].toUpperCase();
   User.prototype.name = function() {
       return sys.name(this.id);
   rand = function rand(min, max) {
       return Math.floor(Math.random() * (max - min + 1)) + min;
   is_undefined = function(val) {
       return typeof (val) === 'undefined' || val === null;
   

9. startsWithString.prototype.startsWith || startsWith(searchString, position)

   String.prototype.startsWith = String.prototype.startsWith || function startsWith(searchString, position) {
      position = position || 0;
       return this.indexOf(searchString, position) === position;
   };