dhall-1.24.0: dhall-lang/Prelude/Text/concatMap

{-
Transform each value in a `List` into `Text` and concatenate the result

Examples:

```
./concatMap Natural (λ(n : Natural) → "${Natural/show n} ") [ 0, 1, 2 ]
= "0 1 2 "

./concatMap Natural (λ(n : Natural) → "${Natural/show n} ") ([] : List Natural)
= ""
```
-}
let concatMap
    : ∀(a : Type) → (a → Text) → List a → Text
    =   λ(a : Type)
      → λ(f : a → Text)
      → λ(xs : List a)
      → List/fold a xs Text (λ(x : a) → λ(y : Text) → f x ++ y) ""

in  concatMap