Trait polkadot_runtime_parachains::paras_inherent::IndexedRetain

pub trait IndexedRetain<T> {
    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.

Implementations on Foreign Types

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

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

Implementors