EBKey#2639
#How to detect if a parameter / object entry is optional?
hardy brambleBOT
EBKey#2639
jolly comet
I believe above sample explains what I'm trying to achieve
hardy brambleBOT
That_Guy977#5882
dense viper
this works for the example you've given but it checks the entire tuple of parameters at once
not sure how you could do it for just a single parameter tbh
jolly comet
hmm thank you, this should be it
i need to check from multiple parameters
but this is a good lead
ill extract the param, create an object/new func with it alone and check it that way
^ okay for objects but not for funcs
valid oracle
ill extract the param, create an object/new func with it alone and check it that...
just a heads up, you'll need to be careful to always keep it as a tuple
so you'd need to avoid T[index] and only do T extends [unknown, unknown, unknown, infer Fourth, ...unknown[]] ? IsSingleParamOptional<Fourth> : never
or use a recursive type i guess
wait no
jolly comet
T extends [T, infer X, ...Parameters<T>] something?
valid oracle
so you'd need to avoid `T[index]` and only do `T extends [unknown, unknown, unkn...
it'd need to be a lot more cursed
no, you'll have to make it so that the rest parameter contains just the one element
so something like:
[unknown, unknown, unknown, unknown, ...infer End]
[...infer Start, End]
[unknown, unknown, unknown, ...infer Fourth]
or maybe you could do something cursed with mapped types
jolly comet
i think good inferface would be: IsOptional<T extends Func, Index extends number>
jolly comet
^ okay for objects but not for funcs
welp actually:
type IsParamOptional<T extends MyOptionalFunc | MyRequiredFunc, I extends number> = Pick<Parameters<T>, I> extends Required<Pick<Parameters<T>, I>> ? false : true;
🤦