Nodejs String to Upper Case toUpperCaseFirst()

Method Source Code

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

Related

1. toUpper()

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

2. toUpper()

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

3. 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;
   };
   

4. toUpperCaseFirst()

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

5. toUpperCaseFirst()

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

6. toUpperCaseFirstLetter()

   window.upperCaseFirstLetter = (str)=>{
     return str.replace(/^\w/, function(w){return w.toUpperCase()});
   String.prototype.toUpperCaseFirstLetter = function(){
     return upperCaseFirstLetter(this);
   

7. toUpperLowerCase()

   String.prototype.toUpperLowerCase = function() {
       var string = this.split("");
       string[0] = string[0].toUpperCase();
       return string.join("");
   };
   

8. toUpperLowerCase()

   String.prototype.toUpperLowerCase = function() {
       var string = this.split("");
       string[0] = string[0].toUpperCase();
       return string.join("");
   };
   String.prototype.firstUpper = function() {
       return this.charAt(0).toUpperCase() + this.slice(1);
   };
   

9. ucWords()

   String.prototype.ucWords = function () {
       return this.split(' ').map(function (w) {
           return w.substr(0, 1).toUpperCase() + w.substr(1); 
       }).join(' ');