Struct ReadOnlyDictionaryView<TKey, TInput, TOutput>

Represents lazily converted read-only dictionary.

Implements

IReadOnlyDictionary<TKey, TOutput>

IReadOnlyCollection<KeyValuePair<TKey, TOutput>>

IEnumerable<KeyValuePair<TKey, TOutput>>

IEnumerable

IEquatable<ReadOnlyDictionaryView<TKey, TInput, TOutput>>

Inherited Members

ValueType.ToString()

object.Equals(object, object)

object.GetType()

object.ReferenceEquals(object, object)

Namespace: DotNext.Collections.Generic

Assembly: DotNext.dll

Syntax

public readonly struct ReadOnlyDictionaryView<TKey, TInput, TOutput> : IReadOnlyDictionary<TKey, TOutput>, IReadOnlyCollection<KeyValuePair<TKey, TOutput>>, IEnumerable<KeyValuePair<TKey, TOutput>>, IEnumerable, IEquatable<ReadOnlyDictionaryView<TKey, TInput, TOutput>>

Type Parameters

Name	Description
TKey	Type of dictionary keys.
TInput	Type of values in the source dictionary.
TOutput	Type of values in the converted dictionary.

Remarks

Initializes a new lazily converted view.

Constructors

ReadOnlyDictionaryView(IReadOnlyDictionary<TKey, TInput>, Converter<TInput, TOutput>)

Initializes a new lazily converted view.

Declaration

public ReadOnlyDictionaryView(IReadOnlyDictionary<TKey, TInput> dictionary, Converter<TInput, TOutput> mapper)

Parameters

Type	Name	Description
IReadOnlyDictionary<TKey, TInput>	dictionary	Read-only dictionary to convert.
Converter<TInput, TOutput>	mapper	Value converter.

ReadOnlyDictionaryView(IReadOnlyDictionary<TKey, TInput>, Func<TInput, TOutput>)

Represents lazily converted read-only dictionary.

Declaration

public ReadOnlyDictionaryView(IReadOnlyDictionary<TKey, TInput> dictionary, Func<TInput, TOutput> mapper)

Parameters

Type	Name	Description
IReadOnlyDictionary<TKey, TInput>	dictionary	Read-only dictionary to convert.
Func<TInput, TOutput>	mapper	Value converter.

Remarks

Initializes a new lazily converted view.

Properties

Count

Count of key/value pairs.

Declaration

public int Count { get; }

Property Value

Type	Description
int

this[TKey]

Gets value associated with the key and convert it.

Declaration

public TOutput this[TKey key] { get; }

Parameters

Type	Name	Description
TKey	key	The key of the element to get.

Property Value

Type	Description
TOutput	The converted value associated with the key.

Exceptions

Type	Condition
KeyNotFoundException	The requested key doesn't exist.

Keys

All dictionary keys.

Declaration

public IEnumerable<TKey> Keys { get; }

Property Value

Type	Description
IEnumerable<TKey>

Values

All converted dictionary values.

Declaration

public IEnumerable<TOutput> Values { get; }

Property Value

Type	Description
IEnumerable<TOutput>

Methods

ContainsKey(TKey)

Determines whether the wrapped dictionary contains an element with the specified key.

Declaration

public bool ContainsKey(TKey key)

Parameters

Type	Name	Description
TKey	key	The key to locate in the dictionary.

Returns

Type	Description
bool	true if the key exists in the wrapped dictionary; otherwise, false.

Equals(ReadOnlyDictionaryView<TKey, TInput, TOutput>)

Determines whether two converted dictionaries are same.

Declaration

public bool Equals(ReadOnlyDictionaryView<TKey, TInput, TOutput> other)

Parameters

Type	Name	Description
ReadOnlyDictionaryView<TKey, TInput, TOutput>	other	Other dictionary to compare.

Returns

Type	Description
bool	true if this view wraps the same source dictionary and contains the same converter as other view; otherwise, false.

Equals(object?)

Determines whether two converted dictionaries are same.

Declaration

public override bool Equals(object? other)

Parameters

Type	Name	Description
object	other	Other dictionary to compare.

Returns

Type	Description
bool	true if this view wraps the same source dictionary and contains the same converter as other view; otherwise, false.

Overrides

ValueType.Equals(object)

GetEnumerator()

Returns enumerator over key/value pairs in the wrapped dictionary and performs conversion for each value in the pair.

Declaration

public IEnumerator<KeyValuePair<TKey, TOutput>> GetEnumerator()

Returns

Type	Description
IEnumerator<KeyValuePair<TKey, TOutput>>	The enumerator over key/value pairs.

GetHashCode()

Returns hash code for the this view.

Declaration

public override int GetHashCode()

Returns

Type	Description
int	The hash code of this view.

Overrides

ValueType.GetHashCode()

TryGetValue(TKey, out TOutput)

Returns the converted value associated with the specified key.

Declaration

public bool TryGetValue(TKey key, out TOutput value)

Parameters

Type	Name	Description
TKey	key	The key whose value to get.
TOutput	value	The converted value associated with the specified key, if the key is found; otherwise, the default value for the type of the value parameter. This parameter is passed uninitialized.

Returns

Type	Description
bool	true, if the dictionary contains the specified key; otherwise, false.

Operators

operator ==(in ReadOnlyDictionaryView<TKey, TInput, TOutput>, in ReadOnlyDictionaryView<TKey, TInput, TOutput>)

Determines whether two views are same.

Declaration

public static bool operator ==(in ReadOnlyDictionaryView<TKey, TInput, TOutput> first, in ReadOnlyDictionaryView<TKey, TInput, TOutput> second)

Parameters

Type	Name	Description
ReadOnlyDictionaryView<TKey, TInput, TOutput>	first	The first dictionary to compare.
ReadOnlyDictionaryView<TKey, TInput, TOutput>	second	The second dictionary to compare.

Returns

Type	Description
bool	true if the first view wraps the same source dictionary and contains the same converter as the second view; otherwise, false.

operator !=(in ReadOnlyDictionaryView<TKey, TInput, TOutput>, in ReadOnlyDictionaryView<TKey, TInput, TOutput>)

Determines whether two views are not same.

Declaration

public static bool operator !=(in ReadOnlyDictionaryView<TKey, TInput, TOutput> first, in ReadOnlyDictionaryView<TKey, TInput, TOutput> second)

Parameters

Type	Name	Description
ReadOnlyDictionaryView<TKey, TInput, TOutput>	first	The first dictionary to compare.
ReadOnlyDictionaryView<TKey, TInput, TOutput>	second	The second collection to compare.

Returns

Type	Description
bool	true if the first view wraps the different source dictionary and contains the different converter as the second view; otherwise, false.

Implements

IReadOnlyDictionary<TKey, TValue>

IReadOnlyCollection<T>

IEnumerable<T>

IEnumerable

IEquatable<T>

Extension Methods

BasicExtensions.IsBetween<T, TLowerBound, TUpperBound>(T, TLowerBound, TUpperBound)

BasicExtensions.IsOneOf<T>(T, ReadOnlySpan<T>)

Collection.ToAsyncEnumerator<TEnumerator, T>(TEnumerator, CancellationToken)

Collection.ToClassicEnumerator<TEnumerator, T>(TEnumerator)

Enumerator.Skip<TEnumerator, T>(ref TEnumerator, int)

ExpressionBuilder.Const<T>(T)

Collection.Append<T>(IEnumerable<T>, params T[])

Collection.Copy<T>(IEnumerable<T>, int, MemoryAllocator<T>?)

Collection.ElementAt<T>(IEnumerable<T>, int, out T)

Collection.FirstOrNone<T>(IEnumerable<T>)

Collection.ForEachAsync<T>(IEnumerable<T>, Func<T, CancellationToken, ValueTask>, CancellationToken)

Collection.ForEach<T>(IEnumerable<T>, Action<T>)

Collection.LastOrNone<T>(IEnumerable<T>)

Collection.Prepend<T>(IEnumerable<T>, params T[])

Collection.SequenceHashCode<T>(IEnumerable<T>, bool)

Collection.ToAsyncEnumerable<T>(IEnumerable<T>)

Collection.ToString<T>(IEnumerable<T>, string, string)

Enumerator.GetAsyncEnumerator<T>(IEnumerable<T>, CancellationToken)

Collection.Convert<TInput, TOutput>(IReadOnlyCollection<TInput>, Converter<TInput, TOutput>)

Dictionary.ConvertValues<TKey, TValue, TResult>(IReadOnlyDictionary<TKey, TValue>, Converter<TValue, TResult>)

Dictionary.IndexerGetter<TKey, TValue>(IReadOnlyDictionary<TKey, TValue>)

Dictionary.KeysGetter<TKey, TValue>(IReadOnlyDictionary<TKey, TValue>)

Dictionary.ValuesGetter<TKey, TValue>(IReadOnlyDictionary<TKey, TValue>)