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use str = core::str;
/* really feels like there should be a more efficient way to do this */
fn reverse(s: &str) -> ~str {
let mut r = ~"";
str::reserve(&mut r, str::len(s));
for str::each_char(s) |ch| {
str::unshift_char(&mut r, ch)
}
r
}
pure fn hamming(string1: &str, string2: &str) -> int {
let mut hamming = 0;
for str::each_chari(string1) |i, ch| {
if ch != str::char_at(string2, i) {
hamming += 1;
}
}
hamming
}
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