Monad.js (jQuery Logic)

function $(newNumber) {
    this.permementNumber = newNumber;
    console.log(this.permementNumber);
}

$.prototype.add = function(addThisNumber) {
    this.permementNumber = this.permementNumber + addThisNumber;
    return new $(this.permementNumber);
}

$.prototype.minus = function(addThisNumber) {
    this.permementNumber = this.permementNumber - addThisNumber;
    return new $(this.permementNumber);
}

testing = new $(10);

testing.add(20).minus(5).add(50);