Nodejs String Starts With startWith(str)

Method Source Code

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  //from   w w  w  . j  a va  2  s  .  co m
      return false;  
    return true;  
};
String.prototype.endWith=function(str){
    if(str==null||str==""||this.length==0||str.length>this.length)  
      return false;  
    if(this.substring(this.length-str.length)==str)  
      return true;  
    else  
      return false;  
    return true;  
};

function getK(num){
   return Math.floor(num/1000);
}

Related

1. startWith(str)

   String.prototype.startWith = 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(str)

   String.prototype.startWith = function(str) {
     var result = true;
     if (typeof(str)=='string' && str.length <= this.length) {
       for (var i=0,len=str.length;i<len;i++) {
         if (str.charAt(i) == this.charAt(i)) {
           continue;
         } else {
           result = false;
           break;
   ...
   

4. 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);
   };
   

5. 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);        
   

6. startWith(substr)

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

7. startWith(text)

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

8. 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;
   };
   

9. beginsWith( str )

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