Nodejs String Starts With startsWith(other, case_cmp)

Method Source Code

String.prototype.startsWith = function(other, case_cmp) {
  var first  = this;
  var second = other;

  if(!case_cmp) {
    first  = first.toLowerCase();//  w  w  w .  j  a  v a2 s .  c  om
    second = second.toLowerCase();
  }

  return (first.indexOf(second) === 0);
}

Related

1. startsWith(matchString)

   String.prototype.startsWith = function (matchString) {
       if (this == matchString)
           return true;
       var matchString = '^' + matchString + '[\x20-\x7E]+$';
       var regex = new RegExp(matchString);
       return !!this.match(regex);
   };
   

2. startsWith(needle)

   String.prototype.startsWith = function(needle) {
       return this.substr(0, needle.length) == needle;
   

3. startsWith(needle)

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

4. startsWith(needle)

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

5. startsWith(other)

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

6. startsWith(pattern)

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

7. startsWith(pattern)

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

8. startsWith(pattern)

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

9. startsWith(prefix)

   String.prototype.startsWith = function (prefix) {
       return this.indexOf(prefix) === 0;
   String.prototype.endsWith = function (suffix) {
       return this.match(suffix + "$") == suffix;
   };