We talked about Prototype Pattern in previous posts. You can read them at below link. Understanding Prototype Pattern in JavaScript Understanding Prototype Pattern in JavaScript: Part # 2 Revealing Module Pattern allows us to achieve Singleton object Private Public behaviour of functions and properties in the object. Let us consider the usual code we write.ContinueContinue reading “Revealing Module Pattern in JavaScript”
Category Archives: JavaScript
Understanding Prototype Pattern in JavaScript: Part # 2
Recently we had a look on Understanding Prototype Pattern in JavaScript. I tried to explain this pattern in most simplified way. In this post we will get more dipper and see how prototype works in JavaScript. Putting it in simple words in prototype pattern, we create object using template of an existing object. In prototypeContinueContinue reading “Understanding Prototype Pattern in JavaScript: Part # 2”
Understanding Prototype Pattern in JavaScript
I am writing this blog post from Bulgaria Sofia. I am here to attend Devreach conference organised by Telerik . In conference I had an opportunity to meet my great inspiration Dan Wahlin . I attended his session on “Patterns in JavaScript” and I must say it was one of the best technical session IContinueContinue reading “Understanding Prototype Pattern in JavaScript”
Variable Scope Chain in JavaScript
Before you start reading this post I recommend you to read Variable Scoping and Hoisting in JavaScript . In this post we will take a look on Scope Chain in JavaScript. Let us consider you have declare a variable globally as below, In above code variables are declared globally, in other words they are notContinueContinue reading “Variable Scope Chain in JavaScript”
Get it right: null and undefined in JavaScript
Well, whenever I talk to developers, I find them in confusion about null and undefined in JavaScript. In this post I try to simplify understanding of null and undefined in JavaScript. To start with null is language keyword and undefined in value of a variable. Both evaluates to value that indicates absence of a value.ContinueContinue reading “Get it right: null and undefined in JavaScript”
Variable Scoping and Hoisting in JavaScript
Variable Scoping in JavaScript is quite different than other programming languages like C. In this post we will learn variable scoping in JavaScript. Simply putting, Scope of a JavaScript variable is within region of the program it is defined. So a variable defined inside function will have scope inside that function. Consider following code snippet,ContinueContinue reading “Variable Scoping and Hoisting in JavaScript”
Invocation patterns in JavaScript
In JavaScript you can invoke a function in four different ways. In this post we will take a look on various invocation patterns. There are four ways a function can be invoked in JavaScript. Four invocation patterns in JavaScript are as follows, Function Invocation Pattern Method Invocation Pattern Constructor Invocation Pattern Indirect Invocation Pattern FunctionContinueContinue reading “Invocation patterns in JavaScript”
What is Method Invocation Pattern in JavaScript
In this post we will take a look on “Method Invocation Pattern” in JavaScript. In JavaScript when function is defined as property of object then it is known as Method Assume we have a JavaScript object as following. In studentObject object property findgrade is a function. So we can say findgrade is a method. InvocationContinueContinue reading “What is Method Invocation Pattern in JavaScript”
How to find index of an item in JavaScript Object Array?
Recently while working I came across a scenario. I had to find index of a particular item on given condition from a JavaScript object array. In this post we will see how to find index of object from JavaScript array of object. Let us assume we have a JavaScript array as following, Now if weContinueContinue reading “How to find index of an item in JavaScript Object Array?”
What is JSON?
For some of you this question might be the easiest to answer. But for many developers concept of JSON is not well understood. In my seminars when I use JSON data for demo, I find many developers do not have understanding of JSON. In this post I am trying to address this problem. In simpleContinueContinue reading “What is JSON?”
Dhananjay Kumar 