Trait FirstOrDefault 

pub trait FirstOrDefault {
    type Item;

    // Required method
    fn first_or_default(&self) -> Self::Item;
}

Provides first-item lookup with a default value for an empty sequence.

Required Associated Types

type Item

Required Methods

fn first_or_default(&self) -> Self::Item

Returns the first item or the default value.

Implementations on Foreign Types

impl<T> FirstOrDefault for [T]

where T: Default + Clone,

type Item = T

fn first_or_default(&self) -> T

Implementors