gleam/pair
Functions
pub fn first(pair: tuple(a, b)) -> a
Returns the first element in a pair.
Examples
> first(tuple(1, 2))
1
pub fn map_first(
of pair: tuple(a, b),
with fun: fn(a) -> c,
) -> tuple(c, b)
Returns a new pair with the first element having had with
applied to
it.
Examples
> tuple(1, 2) |> map_first(fn(n) { n * 2 })
2
pub fn map_second(
of pair: tuple(a, b),
with fun: fn(b) -> c,
) -> tuple(a, c)
Returns a new pair with the second element having had with
applied to
it.
Examples
> tuple(1, 2) |> map_second(fn(n) { n * 2 })
4
pub fn second(pair: tuple(a, b)) -> b
Returns the second element in a pair.
Examples
> second(tuple(1, 2))
2