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| author | Brian Anderson <banderson@mozilla.com> | 2012-02-12 02:44:40 -0800 |
|---|---|---|
| committer | Brian Anderson <banderson@mozilla.com> | 2012-02-12 19:24:24 -0800 |
| commit | 85175d639f0b40062d2741f4918df48aee3ef758 (patch) | |
| tree | 4da18db0e5df31541dcab6776744a82278127fe0 | |
| parent | c21db3bbc28c47e846783dedfe1eb1228f955f2b (diff) | |
| download | rust-85175d639f0b40062d2741f4918df48aee3ef758.tar.gz rust-85175d639f0b40062d2741f4918df48aee3ef758.zip | |
core: Add iter::reverse
| -rw-r--r-- | src/libcore/iter.rs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/libcore/iter.rs b/src/libcore/iter.rs index 23779e04487..8500ce7a783 100644 --- a/src/libcore/iter.rs +++ b/src/libcore/iter.rs @@ -77,6 +77,11 @@ fn to_list<A:copy,IA:iterable<A>>(self: IA) -> [A] { foldl::<A,[A],IA>(self, [], {|r, a| r + [a]}) } +// FIXME: This could be made more efficient with an riterable interface +fn reverse<A:copy,IA:iterable<A>>(self: IA, blk: fn(A)) { + vec::riter(to_list(self), blk) +} + fn repeat(times: uint, blk: fn()) { let i = 0u; while i < times { @@ -214,3 +219,8 @@ fn test_max() { fn test_max_empty() { max::<int, [int]>([]); } + +#[test] +fn test_reverse() { + assert to_list(bind reverse([1, 2, 3], _)) == [3, 2, 1]; +} \ No newline at end of file |