JSFiddle - React, Tailwind, and code Playground

by PeeHaa

JavaScript

Array.prototype.count = function() {
    var size = 0;
    for (var key in this) {
        if (this.hasOwnProperty(key)) size++;
    }
    
    return size;    
};

(function() {
    var arr = []
    arr['2000'] = '';
    
    console.log({
        Length: arr.length,
        Count: arr.count()
    });    
}());