/Prelude-v23.0.0/List/last.dhall

Copy path to clipboard

Retrieve the last element of the list

Examples

last Natural [ 0, 1, 2 ] ≡ Some 2
last Natural ([] : List Natural) ≡ None Natural

Source

--| Retrieve the last element of the list
let last
: ∀(a : Type) → List a → Optional a
= List/last

let example0 = assert : last Natural [ 0, 1, 2 ] ≡ Some 2

let example1 = assert : last Natural ([] : List Natural) ≡ None Natural

in last