Trait IndexedRetain

pub trait IndexedRetain<T> {
    // Required method
    fn indexed_retain(&mut self, f: impl FnMut(usize, &T) -> bool);
}

A helper trait to allow calling retain while getting access to the index of the item in the vec.

Required Methods

fn indexed_retain(&mut self, f: impl FnMut(usize, &T) -> bool)

Retains only the elements specified by the predicate.

In other words, remove all elements e residing at index i such that f(i, &e) returns false. This method operates in place, visiting each element exactly once in the original order, and preserves the order of the retained elements.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T> IndexedRetain<T> for Vec<T>

fn indexed_retain(&mut self, f: impl FnMut(usize, &T) -> bool)

Implementors