1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![feature(advanced_slice_patterns)]
13 fn foldl<T,U:Clone>(values: &[T],
15 function: |partial: U, element: &T| -> U)
19 foldl(tail, function(initial, head), function),
24 fn foldr<T,U:Clone>(values: &[T],
26 function: |element: &T, partial: U| -> U)
30 foldr(head, function(tail, initial), function),
36 let x = &[1i, 2, 3, 4, 5];
38 let product = foldl(x, 1i, |a, b| a * *b);
39 assert_eq!(product, 120);
41 let sum = foldr(x, 0i, |a, b| *a + b);