I've got another good one to create arrays of a specific size and map over it at the same time.
Array.from({length: 3}, (val, i) => i) // [0, 1, 2]
Oh SHID. This is exactly what I needed so many times, and it finally seems like it's a performant approach?!
It looks quite clean and sleek, so I decided to test out the performance on my pc
Weirdly using Array(N) is about 20% faster than using an array-like {length: N} when used inside Array.from()
I also added comparisons of mapping as a parameter vs (dot)map too.
Wow, that's... humbling. BTW, you could beat out ForLoop with:
ForLoop
const arr = new Array(100) for (let i = 0, i < 100, i++) arr[i] = i
since the size is known in advance.
[...Array(3).keys()] // [0, 1, 2]
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I've got another good one to create arrays of a specific size and map over it at the same time.
Oh SHID.
This is exactly what I needed so many times, and it finally seems like it's a performant approach?!
It looks quite clean and sleek, so I decided to test out the performance on my pc
Weirdly using Array(N) is about 20% faster than using an array-like {length: N} when used inside Array.from()
I also added comparisons of mapping as a parameter vs (dot)map too.
Wow, that's... humbling.
BTW, you could beat out
ForLoopwith:since the size is known in advance.