dhall-1.24.0: dhall-lang/Prelude/List/map

{-
Transform a list by applying a function to each element

Examples:

```
./map Natural Bool Natural/even [ 2, 3, 5 ]
= [ True, False, False ]

./map Natural Bool Natural/even ([] : List Natural)
= [] : List Bool
```
-}
let map
    : ∀(a : Type) → ∀(b : Type) → (a → b) → List a → List b
    =   λ(a : Type)
      → λ(b : Type)
      → λ(f : a → b)
      → λ(xs : List a)
      → List/build
        b
        (   λ(list : Type)
          → λ(cons : b → list → list)
          → List/fold a xs list (λ(x : a) → cons (f x))
        )

in  map