Tag: keyword

Javascript “this” keyword

The “this” keyword is an indispensable, yet often mis-understood, concept in JavaScript object-oriented programming. When used in a JavaScript constructor function, “this” refers to the specific instance of the Object. Through the “this” keyword, properties and methods can be assigned object, also known as a class.

For example:

function Square(intSideLength)
{
this.sideLength = intSideLength;
}

In the preceding example the “this” keyword is used to assign the variable “sideLength” as a property of the Square class.
The “this” keyword is also frequently passed as a parameter on JavaScript events, such as when a checkbox is clicked. In such an instance, “this” refers to the current object, the checkbox.

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Java final modifier keyword

I’ve been a huge fan of the ‘final‘ modifier in Java for function arguments and variables. While there’s some debate on their usefulness for performance, they definitely add in readability and understanding of code as developers are instantly notified by modern IDE’s and when they try to reassign such values as the compiler will indicate the error.

NOTE: Use of final for classes or functions often contradicts the paradigm of Object Oriented programming as you’ll be restricted from extending or overriding those items!