LooselyTyped

(map blog thoughts)

Aug 22, 2012 - JavaScript

On Prototypal Inheritance - Part II

In the first installment of this series, we discussed objects and functions in JavaScript. In this second, and final, installment in this series, we will go a bit further and see how functions are used as “instance factories” or constructors to create objects. We will see how we can use these “constructors” to not only instantiate new instances, but also endow new objects with a predefined set of properties applicable to that “class” of objects (much like Java classes). Finally, we will put it all together to build our own hierarchy. We will also see some potential potholes and how to avoid them in your code.

Aug 18, 2012 - JavaScript

On Prototypal Inheritance

Douglas Crockford refers to JavaScript as “Lisp in C’s Clothing” which gives us an inkling to it’s true power. Unfortunately JavaScript, a language that started with a rushed schedule to production and a specification that was buffeted with strong political winds at it’s inception, has often been “misunderstood”. Despite it’s unfortunate beginnings, amidst the stormy waters laden with many a pitfall like global variables, lie a few pearls of wisdom, of which one is prototypal inheritance. In this 2-series article we will take a deep dive into JavaScript’s prototypal nature - we will see how it works, and more importantly how we, as JavaScript developers can leverage it. We will take it a step further to see how we can develop our own hierarchies to model our code, allowing for better reuse.