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KeyFields

Struct KeyFields 

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pub struct KeyFields(/* private fields */);

Methods from Deref<Target = IndexMap<Name, KeyFields>>§

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pub fn capacity(&self) -> usize

Computes in O(1) time.

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pub fn hasher(&self) -> &S

Return a reference to the map’s BuildHasher.

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pub fn len(&self) -> usize

Return the number of key-value pairs in the map.

Computes in O(1) time.

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pub fn is_empty(&self) -> bool

Returns true if the map contains no elements.

Computes in O(1) time.

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pub fn iter(&self) -> Iter<'_, K, V>

Return an iterator over the key-value pairs of the map, in their order

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pub fn keys(&self) -> Keys<'_, K, V>

Return an iterator over the keys of the map, in their order

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pub fn values(&self) -> Values<'_, K, V>

Return an iterator over the values of the map, in their order

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pub fn contains_key<Q>(&self, key: &Q) -> bool
where Q: Hash + Equivalent<K> + ?Sized,

Return true if an equivalent to key exists in the map.

Computes in O(1) time (average).

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pub fn get<Q>(&self, key: &Q) -> Option<&V>
where Q: Hash + Equivalent<K> + ?Sized,

Return a reference to the value stored for key, if it is present, else None.

Computes in O(1) time (average).

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pub fn get_key_value<Q>(&self, key: &Q) -> Option<(&K, &V)>
where Q: Hash + Equivalent<K> + ?Sized,

Return references to the key-value pair stored for key, if it is present, else None.

Computes in O(1) time (average).

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pub fn get_full<Q>(&self, key: &Q) -> Option<(usize, &K, &V)>
where Q: Hash + Equivalent<K> + ?Sized,

Return item index, key and value

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pub fn get_index_of<Q>(&self, key: &Q) -> Option<usize>
where Q: Hash + Equivalent<K> + ?Sized,

Return item index, if it exists in the map

Computes in O(1) time (average).

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pub fn get_index(&self, index: usize) -> Option<(&K, &V)>

Get a key-value pair by index

Valid indices are 0 <= index < self.len()

Computes in O(1) time.

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pub fn first(&self) -> Option<(&K, &V)>

Get the first key-value pair

Computes in O(1) time.

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pub fn last(&self) -> Option<(&K, &V)>

Get the last key-value pair

Computes in O(1) time.

Trait Implementations§

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impl Debug for KeyFields

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Deref for KeyFields

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type Target = IndexMap<Name, KeyFields>

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl Eq for KeyFields

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impl PartialEq for KeyFields

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fn eq(&self, other: &KeyFields) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for KeyFields

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.