higher_order_functions

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A small collection of traits for implementing higher order functions.

Init:

use higher_order_functions::Init;

struct House { number: usize }

// [T; N]: Init<T, usize>
let road = <[House; 3]>::init(|i| House { number: i + 1 });

assert_eq!(road[0].number, 1);
assert_eq!(road[1].number, 2);
assert_eq!(road[2].number, 3);

Map:

use higher_order_functions::Map;

let arr = [1, 4, 6, -3, 6].map(|x| x * 2);

assert_eq!(arr, [2, 8, 12, -6, 12]);

use higher_order_functions::Map;

let arr = [1, 4, 6, -3, 6].map(f64::from);

assert_eq!(arr, [1.0, 4.0, 6.0, -3.0, 6.0]);

To use this, add it as a dependency to your Cargo.toml:

[dependencies]
higher_order_functions = "0.1.0"