Trait Length 

pub trait Length: Collection {
    // Required method
    fn len(&self) -> usize;

    // Provided methods
    fn is_empty(&self) -> bool { ... }
    fn is_not_empty(&self) -> bool { ... }
}

Required Methods

fn len(&self) -> usize

Provided Methods

fn is_empty(&self) -> bool

True if the container contains 0 elements.

use hexga_core::prelude::*;

assert_eq!([1, 2, 3].is_empty(), false);

let empty_array : [i32; 0] = [];
assert_eq!(empty_array.is_empty(), true);

assert_eq!("".is_empty(), true);
assert_eq!("hello".is_empty(), false);

assert_eq!("".is_empty(), !("".is_not_empty()));

fn is_not_empty(&self) -> bool

True if the container contains at least one element. Will always be different than is_empty().

use hexga_core::prelude::*;

assert_eq!([1, 2, 3].is_not_empty(), true);

let empty_array : [i32; 0] = [];
assert_eq!(empty_array.is_not_empty(), false);

assert_eq!("".is_not_empty(), false);
assert_eq!("hello".is_not_empty(), true);

assert_eq!("".is_empty(), !("".is_not_empty()));

Implementations on Foreign Types

impl Length for &str

fn len(&self) -> usize

impl Length for &mut str

fn len(&self) -> usize

impl Length for str

fn len(&self) -> usize

impl Length for String

fn len(&self) -> usize

impl Length for OsStr

Available on crate feature std only.

fn len(&self) -> usize

impl<T> Length for &[T]

fn len(&self) -> usize

impl<T> Length for &mut [T]

fn len(&self) -> usize

impl<T> Length for [T]

fn len(&self) -> usize

impl<T> Length for LinkedList<T>

fn len(&self) -> usize

impl<T> Length for Vec<T>

fn len(&self) -> usize

impl<T, const CAP: usize> Length for ArrayVec<T, CAP>

fn len(&self) -> usize

impl<T, const N: usize> Length for [T; N]

fn len(&self) -> usize

Implementors

impl<K, Gen, S> Length for GenSetOf<K, Gen, S>

where K: Clone, Gen: IGeneration, S: Collection,

impl<K, V> Length for BTreeMap<K, V>

impl<K, V, Gen, S> Length for GenMapOf<K, V, Gen, S>

where K: Clone, Gen: IGeneration, S: Collection,

impl<K, V, S> Length for HashMap<K, V, S>

Available on crate feature std only.

impl<T> Length for BTreeSet<T>

impl<T> Length for BinaryHeap<T>

impl<T> Length for HslaOf<T>

impl<T> Length for NonEmptyStack<T>

impl<T> Length for RgbaOf<T>

impl<T> Length for VecDeque<T>

impl<T> Length for RectangleOf<T>

impl<T, Gen, C> Length for GenSeq<T, Gen, C>

where C: AsRef<[Entry<T, Gen>]>, Gen: IGeneration,

impl<T, Idx> Length for ImageBaseOf<T, Idx>

where Idx: Integer,

impl<T, Idx, const N: usize> Length for GridOf<T, Idx, N>

where Idx: Integer,

impl<T, S> Length for HashSet<T, S>

Available on crate feature std only.

impl<T, const N: usize> Length for Vector<T, N>