utils/
vec.rs

1//!
2//!  vec.rs
3//!
4//!  Created by Mitchell Nordine at 01:25AM on November 18, 2014.
5//!
6//!
7
8
9/// Take only the elements that return `true` from the given condition.
10pub trait TakeOnly<T> {
11    /// Take only the elements that return `true` from the given condition.
12    fn take_only<F>(&mut self, F) -> Vec<T> where F: Fn(&T) -> bool;
13}
14
15impl<T> TakeOnly<T> for Vec<T> {
16    fn take_only<F>(&mut self, cond: F) -> Vec<T> where F: Fn(&T) -> bool {
17        let mut vec = Vec::with_capacity(self.len());
18        let mut i = 0;
19        while i < self.len() {
20            let cond_result = cond(&self[i]);
21            if cond_result {
22                vec.push(self.remove(i));
23            } else {
24                i += 1;
25            }
26        }
27        vec
28    }
29}
30
utils/vec.rs

utils/
vec.rs
