Nodejs String to Upper Case toUpper()

Method Source Code

//Replaces any lower case letter found in a string
//with upper case equivalent
String.prototype.toUpper = function() {

  //Gets the ascii code of matched upper case alphabet, adds 32 from it to
  //get ascii code of equivalent lower case alphabet and converts it to alphabet
  return this.replace(/[a-z]/g, function(x) {
    return String.fromCharCode(x.charCodeAt(0) - 32);
  });/*w  ww . j a  v a 2  s. c om*/

}

Related

1. toUpper()

   String.prototype.toUpper = function() {
     var pattern = /[a-z]/g;
     return this.replace(pattern, function(args) {
       return String.fromCharCode(args.charCodeAt() - 32);
     });
   };
   

2. toUpper()

   String.prototype.toUpper = function(){
     result = this.replace(/[a-z]/g, function(x){
       return x.toUpperCase();
     });
     return result;
   };
   

3. toUpper()

   String.prototype.toUpper = function() {
     return this.replace(/([a-z])/g, function(match){
       return String.fromCharCode(match.charCodeAt(0) - 32);
     });
   };
   

4. toUpperCase()

   String.prototype.toUpperCase = function() {
     var s = "";
     for (var i = 0, len = this.length; i < len; i++) {
       var char = this.charCodeAt(i);
       if (char >= 97 && char <= 122) {
         s += String.fromCharCode(char - 32);
       } else {
         s += this[i];
     return s;
   };
   

5. toUpperCaseFirst()

   String.prototype.toUpperCaseFirst = function() {
       return this.charAt(0).toUpperCase() + this.slice(1);
   };
   

6. toUpperCaseFirst()

   String.prototype.toUpperCaseFirst = function() {
       return this[0].toUpperCase() + this.substr(1);
   };
   

7. toUpperCaseFirst()

   String.prototype.toUpperCaseFirst = function() {
     return this.slice(0,1).toUpperCase() + this.slice(1).toLowerCase();
   };