V: array.find() / array.index_of()

[lobotony]

Can we have a function that searches for a given element by value and

• returns its first index, if found
• or a -1 or error, if not found
  ?

Basically what "a in b" does for arrays, only returning an int instead of a bool.
re: naming:
.find(value) or
.index_of(value) or
.first_index_of(value) or

Docs should make clear that it returns the first index of the element that has the same value as the provided one.

Thanks.

[dhonx]

I think find(value) will be better?

[Metalymph]

I think it could be like C#, simple and clean. For example:

arr := [1,2,3,4]
elem := arr.find(3)? // returns ?int
elem_index := arr.first(predicate)? // returns ?T
elements := arr.find_all(predicate)? // returns ?[]T or []T to check

it would be possibile to write a lot of useful and well documented functions, avoiding the boring and verbose Go style

[Delta456]

Done https://github.com/vlang/v/commit/68bcf6830cb0a3572b21880cdb949dd187548424