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stdlib: Implement ivec::count

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This commit is contained in:
Patrick Walton 2011-07-12 17:00:25 -07:00
parent b97318bb80
commit 032c4deefe
1 changed files with 6 additions and 0 deletions
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6
src/lib/ivec.rs
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@ -208,6 +208,12 @@ fn member[T](&T x, &T[] v) -> bool {
ret false;
}
fn count[T](&T x, &T[mutable?] v) -> uint {
auto cnt = 0u;
for (T elt in v) { if (x == elt) { cnt += 1u; } }
ret cnt;
}
fn find[T](fn(&T) -> bool f, &T[] v) -> option::t[T] {
for (T elt in v) { if (f(elt)) { ret some[T](elt); } }
ret none[T];