Nodejs String Starts With beginsWith(s)

Method Source Code

String.prototype.beginsWith= function(s)
{
    return s===this.substring(0, s.length);
}

/** Safari 2 doesn't define the localeCompare. This probably will be slow.
 **///from ww  w  . j  a  v a 2s .  co m
if (!String.prototype.localeCompare)
    String.prototype.localeCompare = function(other)
    {
        if (this < other)
            return -1;
        else if (this > other)
            return 1;
        else
            return 0;
    }

String.prototype.expand = function(obj, defaultValue)
{
    function lookupKey(str, key)
    {
        var value= obj[key];
        if (null===value || 'undefined'===typeof(value))
            return defaultValue;
        return value;
    }

    return this.replace(/\$\{(\w+)\}/g, lookupKey);
}

Related

1. startWith(substr)

   String.prototype.startWith = function(substr) {
       return this.indexOf(substr) == 0;
   };
   

2. startWith(text)

   String.prototype.startWith = function (text) {
       return this.indexOf(text) == 0;
   };
   var msg = "Hello world!";
   console.log(msg.startWith("Hello"));
   

3. startWithVowel()

   String.prototype.startWithVowel = function () {
       return this.charAt(0).toLowerCase().isVowel();
   };
   String.prototype.isVowel = function () {
       var vowels = ['a', 'e', 'i', 'o', 'u'];
       return vowels.indexOf(this.toLowerCase()) != -1;
   };
   

4. beginsWith( str )

   String.prototype.beginsWith = function( str ) {
       return this.substr( 0, str.length ) == str;
   };
   

5. beginsWith(s)

   String.prototype.beginsWith = function(s){
       return this.indexOf(s) == 0;
   };
   

6. beginsWith(t)

   String.prototype.beginsWith = function(t) {
       'use strict';
       t = t.toString();
       return (t.toString() === this.substring(0, t.length));
   };
   String.prototype.trim = function() {
       'use strict';
       return this.replace(/^\s+/,'').replace(/\s+$/,'');
   };
   ...
   

7. beginsWith(t)

   String.prototype.beginsWith = function(t) {
       'use strict';
       t = t.toString();
       return (t.toString() === this.substring(0, t.length));
   };
   

8. beginsWith(t, i)

   String.prototype.beginsWith = function(t, i) {
     if (i == false) {
       return (t == this.substring(0, t.length));
     } else {
       return (t.toLowerCase() == this.substring(0, t.length).toLowerCase());
   };
   

9. beginsWithVowel()

   String.prototype.beginsWithVowel = function(){
     if (this == "") return false;
     return "aeiou".split("").indexOf(this[0].toLowerCase()) !== -1
   function translatePigLatin(str) {
      var nonv = str.split(/[aeiou]/)[0].length
      if (nonv == 0){
          return str + "way";
       }else {
   ...