Please can anybody tell me what (...fns),initalVal ,fn and Val mean

Question

const compose = (...fns) => (initialVal) => fns.reduceRight((val, fn) => fn(val), initialVal);

Answer 1

https://www.freecodecamp.org/news/function-composition-in-javascript/

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduceRight

Answer 2

Ok thanks a lot..let me go through it

Answer 3

Ok thanks.Was able to get the meanings although explanation was still sketchy, they didn't give any examples before moving to pipeline..I'll just keep searching for examples where it was applied.

Answer 4

Where did you get that example?

Answer 5

I actually understood the whole concept previously and even tried it on 2 functions but it was reading left to right like pipe.
Now from these links you sent,I want to reference this from freecodecamp

compose = (fn1, fn2) => value => fn2(fn1(value)

What does value stand for? is it an argument?

Answer 6

This below is more like the pipe analogy

const Drive=function(car){
return ` i cruised through the Empire city with the ${car}`}
const Park=function(car){
return `then came back home to my four car garage to drop the keys to the ${car}`}

console.log(Drive(Park("ferrari")))

Answer 7

Sorry I thought the links explained well what the functions in your question were.

Please disregard if it confused you more.

This shall explain the exact reduceright function.

https://gideonpyzer.dev/blog/2017/01/02/javascript-function-composition-and-pipelines/

Answer 8

It's on virtually every functional programming compose and pipe method in JavaScript online