Std.List.mapAccum
1 declaration
fn
mapAccum: &Array[T] -> fn(A, T) -> (A, B) -> A -> (A, Array[B])This is a callable function.
What it does
A fold that also collects what each step produced, left to right.
Read the signature
- The text after the name is the type checked by Pudu.
- Read arrows from left to right: inputs come first, and the final type is returned.
- & borrows a value for this call instead of moving or copying it.
- Names inside [ ] are type arguments, such as the item type held by a collection.