FP techniques that will help you write better JavaScript

Re:FP techniques that will help you write better JavaScript by gear54rus on Friday February 11, 2022 @03:43AM (#30298847)

for is awkward in JS because you get either keys or values and not both

ForEach does get you both.

I don't remember using for loop for at least 3 years previously as a frontend engineer :)

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Re:FP techniques that will help you write better JavaScript by feupan on Friday February 11, 2022 @08:57AM (#30301524)

for (const [index, value] of array.entries()) {}

It is longer than:

array.forEach((value, index) => {})

… but forEach has too many limitations (no exits, no await, …)

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Re:FP techniques that will help you write better JavaScript by gear54rus on Saturday February 12, 2022 @03:55AM (#30311172)

oh yeah, destructuring's nice

I'll give you await (gotta use awkward reduce there) but if you want exit, you're better off with something like `find`

Another advantage is that array functions better convey what are you trying to do with this particular operation.

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