var calculator = {
    result: 0,
    one: function () {
        this.result = this.result + 1;
        return this;
    },
    three: function () {
        this.result = this.result + 3;
        return this;
    },
    five: function () {
        this.result = this.result + 5;
        return this;
    },
    value: function () {
        console.log(this.result);
    }
}
calculator.one().three().five().value();