2018-08-30 14:18:55 +02:00
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// run-pass
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2018-08-31 15:02:01 +02:00
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#![allow(non_camel_case_types)]
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2014-03-06 00:28:08 +01:00
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2015-03-22 21:13:15 +01:00
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2013-07-09 20:14:17 +02:00
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trait vec_utils<T> {
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2015-01-02 23:32:54 +01:00
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fn map_<U, F>(x: &Self, f: F) -> Vec<U> where F: FnMut(&T) -> U;
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2013-07-09 20:14:17 +02:00
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}
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2014-03-05 23:02:44 +01:00
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impl<T> vec_utils<T> for Vec<T> {
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2015-01-02 23:32:54 +01:00
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fn map_<U, F>(x: &Vec<T> , mut f: F) -> Vec<U> where F: FnMut(&T) -> U {
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2014-03-05 23:02:44 +01:00
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let mut r = Vec::new();
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2015-01-31 18:20:46 +01:00
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for elt in x {
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2013-07-09 20:14:17 +02:00
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r.push(f(elt));
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}
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r
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}
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}
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2013-09-25 09:43:37 +02:00
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pub fn main() {
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2016-10-29 23:54:04 +02:00
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assert_eq!(vec_utils::map_(&vec![1,2,3], |&x| x+1), [2,3,4]);
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2013-07-09 20:14:17 +02:00
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}
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