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gleam_stdlib src gleam function.gleam
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src/gleam/function.gleam

// Takes two functions and chains them together to form one function that takes
// the input from the first and returns the output of the second.
pub fn compose(fun1: fn(a) -> b, fun2: fn(b) -> c) -> fn(a) -> c {
fn(a) { fun1(a) |> fun2 }
}
// Takes a function that takes two arguments and returns a new function that
// takes the same two arguments, but in reverse order.
pub fn flip(fun: fn(a, b) -> c) -> fn(b, a) -> c {
fn(b, a) { fun(a, b) }
}
// A function that always returns its input value.
pub fn identity(x: a) -> a {
x
}