JSFiddle - React, Tailwind, and code Playground

by pollo

JavaScript

var add = function add (x, y){
    return x + y;
};

var once = function once (func){
    return function(){
        var f = func;
        func = null;
        
        return f.apply(this, arguments);
    };    
};

var add_once = once(add);

alert(add_once(3,4));
alert(add_once(4,4));