/Prelude-v23.0.0/NonEmpty/any.dhall

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Returns True if the supplied function returns True for any element in the NonEmpty list

Examples

any Natural Natural/even { head = 2, tail = [ 3, 5 ] } ≡ True
any Natural Natural/even { head = 3, tail = [] : List Natural } ≡ False

Source

{-|
Returns `True` if the supplied function returns `True` for any element in the
`NonEmpty` list
-}
let NonEmpty =
missing sha256:e2e247455a858317e470e0e4affca8ac07f9f130570ece9cb7ac1f4ea3deb87f
? ./Type.dhall

let NonEmpty/toList =
missing sha256:0977fe14b77232a4451dcf409c43df4589c4b3cdde7b613aab8df183be1b53f5
? ./toList.dhall

let any
: ∀(a : Type) → (a → Bool) → NonEmpty a → Bool
= λ(a : Type) →
λ(f : a → Bool) →
λ(xs : NonEmpty a) →
List/fold
a
(NonEmpty/toList a xs)
Bool
(λ(x : a) → λ(r : Bool) → f x || r)
False

let example0 =
assert : any Natural Natural/even { head = 2, tail = [ 3, 5 ] } ≡ True

let example1 =
assert
: any Natural Natural/even { head = 3, tail = [] : List Natural } ≡ False

in any