Nodejs String Starts With beginsWith( str )

Method Source Code

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

Related

1. startWith(str)

   String.prototype.startWith=function(str){     
     var reg=new RegExp("^"+str);     
     return reg.test(this);        
   String.prototype.endWith=function(str){     
     var reg=new RegExp(str+"$");     
     return reg.test(this);        
   

2. startWith(str)

   String.prototype.startWith=function(str){  
       if(str==null||str==""||this.length==0||str.length>this.length)  
         return false;  
       if(this.substr(0,str.length)==str)  
         return true;  
       else  
         return false;  
       return true;  
   };
   ...
   

3. startWith(substr)

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

4. startWith(text)

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

5. 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;
   };
   

6. beginsWith(s)

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

7. beginsWith(s)

   String.prototype.beginsWith= function(s)
       return s===this.substring(0, s.length);
   if (!String.prototype.localeCompare)
       String.prototype.localeCompare = function(other)
           if (this < other)
               return -1;
   ...
   

8. 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+$/,'');
   };
   ...
   

9. beginsWith(t)

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