In computer science, functional programming is a programming paradigm—a style of building the structure and elements of computer programs—that treats computation as the evaluation of mathematical functions and avoids changing-state and mutable data. (WIKI)
Do you understand anything of it ? If not then I think we are then same! I also don’t understanding anything when I first read this meaning. What is mutable data ? or what is the meaning of this? Why it even used ?Let’s start will what is a mutable data ?
Mutable data means you can change this data. Like – suppose we’ve a variable a=5 and in later we change the value and put 10 in a by a=10.
But In functional programming, we don’t use mutable data. Instead we use immutable data. We can’t change a data after we declare it. In JavaScript we use – const for declare immutable data, which you can’t change!
Now do you know why we use functional programming ? Let me tell you the reasons
- Improve modularity
- Less code code redundancy
- More easier to solve complex problems
- More maintainable
- More Efficiency & some more
If you are using JS and used features like map or reduce. Do you know one thing?
You’re already using the functional programming!
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Originally it published on nerdjfpbblog. You can connect with me in twitter or linkedin !
Top comments (2)
Hi Muhammad and thank you for the article, however I have to highlight a possible mistake and source of confusion:
const
does not guarantee immutability in JavaScript, but rather non-reassignability.For example:
But:
Yes I understand this part! I forgot about the object part!