₦airaland Forum

A closure is a function that remembers its outer variables and can access them.

In JavaScript, closures are created every time a function is created.

To see it in action, watch this video:


https://www.youtube.com/watch?v=otNkXqcihpA

Kudos.
Love the concept of pidgin. We are Nigerians

Keep it up broda

I have a question concerning closures.

I wrote this function expression recently (first image), i expected it to return the inner function but it returned NaN.

So i changed it to a function declaration (second image) and it returned the inner function just as i wanted.

So my question is why did both functions behave differently with regards to closures. I know that there are little differences between function expressions and function declarations. Thanks

@spartan117
The issue is the one is an arrow function and the other isnt and arrow functions. Keeping in mind that arrow functions dont have the arguements keyword

modash:
@spartan117
The issue is the one is an arrow function and the other isnt and arrow functions. Keeping in mind that arrow functions dont have the arguements keyword

Spot on!

modash:
@spartan117
The issue is the one is an arrow function and the other isnt and arrow functions. Keeping in mind that arrow functions dont have the arguements keyword

In addition:

Arrow functions do not have arguments binding. But they have access to the arguments object of the closest non-arrow parent function.

engrjoshua:
Kudos.
Love the concept of pidgin. We are Nigerians

Keep it up broda

Thank you, I hail!

modash:
@spartan117
The issue is the one is an arrow function and the other isnt and arrow functions. Keeping in mind that arrow functions dont have the arguements keyword

Ah I see!
Thanks for this

pidginedtec:
In addition:

Arrow functions do not have an arguments binding. But they have access to the arguments object of the closest non-arrow parent function.

Now i understand better.
Thanks man