Arrow operation in javascript

Question

I understand the array operation in javascript is a shorter syntax of function expression. However, I don't understand the following code when several =>s put together, what does it mean?

const logger = store => next => action => {
  let result = next(action)
  return result
}

It means someone is abusing readability for the sake of brevity. — Jamiec, Sep 30 '16 at 10:38
Curried version. Instead of having a function with multiple arguments you have a function that always has 1 argument but returns a function until it "collects" enough args. Compare `const add = (x, y) => x + y; const addCurried = x => y => x + y` — Yury Tarabanko, Sep 30 '16 at 10:41

score 2 · Accepted Answer · edited May 23 '17 at 12:00

2

This is a curried function.

There is an in-depth description here: What do multiple arrow functions mean in javascript?

edited May 23 '17 at 12:00

Community

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answered Sep 30 '16 at 10:37

Andrew Burns

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Aha! Thanks. I understand what curried function means. So essentially this is a high order function that a function returns another function, is it correct? – Qian Chen Sep 30 '16 at 10:39
1

That is correct, yes! – Andrew Burns Sep 30 '16 at 10:42

Arrow operation in javascript

1 Answers1