Nodejs String Empty Check isEmpty()

Method Source Code

"use strict";/*from w  w w .ja  v  a  2  s  . co  m*/

String.prototype.isEmpty = function() {
    return (this.length === 0 || !this.trim());
};

Related

1. isNullOrEmptyString(obj)

   function isNullOrEmptyString(obj) {
     if (isNullOrUnderdefined(obj))
       return false;
     if (isStringType(obj)) {
       return obj.length == 0;
     return false;
   

2. isNullOrWhitespace()

   String.prototype.isNullOrWhitespace = function () {
     return this === null || this.replace(/\s/g, '').length === 0;
   };
   

3. isNullOrWhitespace(input)

   String.isNullOrWhitespace = function( input ) {
     return !input || !input.trim();
   };
   

4. isEmpty()

   String.prototype.isEmpty = function() {
     return this == '';
   };
   

5. isEmpty()

   String.prototype.isEmpty = function() {
       return (this.length === 0 || !this.trim());
   };
   

6. isEmpty()

   String.prototype.isEmpty = function() {
     return this.length === 0 || !this.trim();
   };
   

7. isEmpty()

   String.prototype.isEmpty = function() {
       return this == null || this == '';
   };
   RegExp.escape = function(val) {
       return val.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
   };
   

8. isEmpty()

   String.prototype.isEmpty = function() { 
     return (!this.length) 
   

9. isEmpty()

   String.prototype.isEmpty = function() {
     return this.toString().trim() == "";
   };