I was working on a specific requirement where in an input text can sometimes be wrongly formatted to contain alphabets other than digits.

If you notice, Number.isNaN always almost returns false and this is because this function should only be used to verify id the input is NaN datatype or not. This will not help us to verify  - is an input a number only or does it have any non-digit contents.

The only time when Number.isNaN returns true is when the value fed to it is indeed an 'NaN'. If you want to verify if the input really has anything apart from a non-digit in it, we can do something like this.

Number.isNaN came into picture because == and === both fail to verify the conditional check for a variable against NaN.

Ramda helps you bring functional programming (FP) paradigm to your JavaScript code. It makes use of the rich FP practices of Higher-order functions, currying, composition and others.

In the upcoming videos on my channel at Nodejs-Everyday I will show you all of these code snippets hands-on along with a series on Functional Programming with JavaScript.

We will have a look at few of the functions that we can use in our everyday code to kick-start using Ramda.js.

When we talk about functional programming, one of the 1st feature from FP that almost all talk about is MAP.

Map function takes in a functor and applies them on each of the element from the array/ object that we work with.

Here is the example of Map function.

If we have to do the same in ES5 using loops, we write it like this
What if we want to filter the students who class is 'CS'? We use the same loop from above and do a conditional check like below.
we can achieve the same using Ramda, the functional style with chaining the functions as below.

We will take a break here and examine the features in the next article. We will talk about Flatten, finding duplicates, merge and others

For over 7 years, I was made to believe that SWITCH-CASE is better than IF-ELSE and almost all always, I was told that switch-case is the best that can ever be...!!!

I was so idiotic. I was fooled not by anyone else but by my own ability in not trying to find if there is really nothing else than these 2 to handle loops.

After moving to JavaScript space, I implemented a requirement with non other than my good OLD friend switch-case. Ahh.. the code review comments were like pooh on my face...!!!

The comments were like this... "This works...! But there is a better way to achieve this...!!!"

Then I started my work on this. Running through many coding articles and concepts, I ended up on how to use the GOOD OLD FRIEND of JAVASCRIPT called the OBJECT LITERAL.

So here is the case


Now using the object literal we can achieve the same in much simpler way. Its like just in 2 lines.

That code is much easy to read and understand let alone writing it. It has dramatically got down the effort that we need to put in.