Trait crow_util::traits::RetainMut

pub trait RetainMut<T> {
    fn retain_mut<F>(&mut self, f: F)
    where
        F: FnMut(&mut T) -> bool;
}

Used to remove all elements from a collection for which the predicate f does not return true.

Required Methods

fn retain_mut<F>(&mut self, f: F) where
    F: FnMut(&mut T) -> bool, 

Retains only the elements specified by the predicate.

In other words, remove all elements e such that f(&mut e) returns false. This method operates in place and preserves the order of the retained elements.

Examples

use crow_util::traits::*;

let mut vec = vec![0, 1, 2, 3, 4, 5];
vec.retain_mut(|x| { *x += 1; *x % 2 == 0 } );
assert_eq!(vec, [2, 4, 6]);

Implementations on Foreign Types

impl<T> RetainMut<T> for Vec<T>

fn retain_mut<F>(&mut self, f: F) where     F: FnMut(&mut T) -> bool,

Implementors