Method extend

src/entity/primary_map.rs:153–158

(&mut self, iter: impl IntoIterator<Item = V>)

    /// keys for the newly added elements.
    #[inline]
    pub fn extend(&mut self, iter: impl IntoIterator<Item = V>) -> EntityRange<K> {
        let from = self.next_key();
        self.elems.extend(iter);
        let to = self.next_key();
        EntityRange { from, to }
    }

    /// Returns the last element that was inserted in the map.
    #[inline]