Trait len_trait::Len

pub trait Len {
    fn len(&self) -> usize;

    fn is_empty(&self) -> bool { ... }
}

A collection with a length.

Obtaining the length of the collection must take O(1) time and space.

Required Methods

fn len(&self) -> usize

Returns the length of the collection.

Provided Methods

fn is_empty(&self) -> bool

Returns whether the collection is empty.

Implementors

• impl<T> Len for [T]
• impl Len for str
• impl Len for CStr
• impl Len for CString
• impl Len for OsStr
• impl Len for OsString
• impl<K: Ord, V> Len for BTreeMap<K, V>
• impl<T: Ord> Len for BTreeSet<T>
• impl<T: Ord> Len for BinaryHeap<T>
• impl<K: Eq + Hash, V> Len for HashMap<K, V>
• impl<T: Eq + Hash> Len for HashSet<T>
• impl<T> Len for LinkedList<T>
• impl Len for String
• impl<T> Len for Vec<T>
• impl<T> Len for VecDeque<T>
• impl Len for BitSet
• impl Len for BitVec
• impl<T> Len for BList<T>
• impl<T: CLike> Len for EnumSet<T>
• impl<T: Ord> Len for IntervalHeap<T>
• impl<K: Eq, V> Len for LinearMap<K, V>
• impl<K: Eq + Hash, V> Len for LinkedHashMap<K, V>
• impl<K: Eq + Hash, V> Len for LruCache<K, V>
• impl<T> Len for VecMap<T>