objext.js

Object.defineProperty(Object.prototype, 'forEach', {
    value: function (func) {
        Object.keys(this).forEach(key => {
            func(this[key], key, this);
        });
    },
});

Object.defineProperty(Object.prototype, 'reduce', {
    value: function (func, value) {
        return Object.keys(this).reduce((total, key) => {
            return func(total, this[key], key, this);
        }, value);
    },
});

Object.defineProperty(Object.prototype, 'map', {
    value: function (func) {
        let ret = {};
    
        Object.keys(this).forEach(key => {
            ret[key] = func(this[key], key, this);
        });
    
        return ret;
    },
});

Object.defineProperty(Object.prototype, 'filter', {
    value: function (func = v => Boolean(v)) {
        let ret = {};
    
        Object.keys(this).forEach(key => {
            if(func.apply && func(this[key], key, this)) {
                ret[key] = this[key];
            }
        });
    
        return ret;
    },
});

Object.defineProperty(Object.prototype, 'toArray', {
    value: function () {
        let ret = [];
    
        for (let key in this) {
            ret.push([key, this[key]]);
        }
    
        return ret;
    },
});