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retired
A standard library for the Gleam programming language
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src/gleam/pair.gleam
pub fn first(pair: tuple(a, b)) -> a {
let tuple(a, _) = pair
a
}
pub fn second(pair: tuple(a, b)) -> b {
let tuple(_, a) = pair
a
}
pub fn swap(pair: tuple(a, b)) -> tuple(b, a) {
let tuple(a, b) = pair
tuple(b, a)
}
pub fn map_first(of pair: tuple(a, b), with fun: fn(a) -> c) -> tuple(c, b) {
let tuple(a, b) = pair
tuple(fun(a), b)
}
pub fn map_second(of pair: tuple(a, b), with fun: fn(b) -> c) -> tuple(a, c) {
let tuple(a, b) = pair
tuple(a, fun(b))
}