Interface ICollection<T>

The simplest interface of a main stream generic collection with lookup, insertion and removal operations.

Inherited Members

IExtensible<T>.AllowsDuplicates

IExtensible<T>.EqualityComparer

IExtensible<T>.DuplicatesByCounting

IExtensible<T>.AddAll(IEnumerable<T>)

IExtensible<T>.Check()

ICollectionValue<T>.ListenableEvents

ICollectionValue<T>.ActiveEvents

ICollectionValue<T>.CollectionChanged

ICollectionValue<T>.CollectionCleared

ICollectionValue<T>.ItemsAdded

ICollectionValue<T>.ItemInserted

ICollectionValue<T>.ItemsRemoved

ICollectionValue<T>.ItemRemovedAt

ICollectionValue<T>.IsEmpty

ICollectionValue<T>.CountSpeed

ICollectionValue<T>.ToArray()

ICollectionValue<T>.Apply(Action<T>)

ICollectionValue<T>.Exists(Func<T, Boolean>)

ICollectionValue<T>.Find(Func<T, Boolean>, T)

ICollectionValue<T>.All(Func<T, Boolean>)

ICollectionValue<T>.Choose()

ICollectionValue<T>.Filter(Func<T, Boolean>)

IShowable.Show(StringBuilder, Int32, IFormatProvider)

System.IFormattable.ToString(System.String, System.IFormatProvider)

System.Collections.Generic.IEnumerable<T>.GetEnumerator()

Namespace: Lucene.Net.Support.C5

Assembly: Lucene.Net.dll

Syntax

public interface ICollection<T> : IExtensible<T>, ICollectionValue<T>, IShowable, IFormattable, ICollection<T>, IEnumerable<T>, IEnumerable

Type Parameters

Name	Description
T

Properties

ContainsSpeed

The value is symbolic indicating the type of asymptotic complexity in terms of the size of this collection (worst-case or amortized as relevant).

See C5.Speed for the set of symbols.

Declaration

Speed ContainsSpeed { get; }

Property Value

Type	Description
Speed	A characterization of the speed of lookup operations ( Contains() etc.) of the implementation of this collection.

Count

Declaration

int Count { get; }

Property Value

Type	Description
System.Int32	The number of items in this collection

IsReadOnly

If true any call of an updating operation will throw an

ReadOnlyCollectionException

Declaration

bool IsReadOnly { get; }

Property Value

Type	Description
System.Boolean	True if this collection is read-only.

Methods

Add(T)

Add an item to this collection if possible. If this collection has set semantics, the item will be added if not already in the collection. If bag semantics, the item will always be added.

Declaration

bool Add(T item)

Parameters

Type	Name	Description
T	item	The item to add.

Returns

Type	Description
System.Boolean	True if item was added.

Clear()

Remove all items from this collection.

Declaration

void Clear()

Contains(T)

Check if this collection contains (an item equivalent to according to the itemequalityComparer) a particular value.

Declaration

bool Contains(T item)

Parameters

Type	Name	Description
T	item	The value to check for.

Returns

Type	Description
System.Boolean	True if the items is in this collection.

ContainsAll(IEnumerable<T>)

Check whether this collection contains all the values in another collection. If this collection has bag semantics (

AllowsDuplicates==true

) the check is made with respect to multiplicities, else multiplicities are not taken into account.

Declaration

bool ContainsAll(IEnumerable<T> items)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	items	The

Returns

Type	Description
System.Boolean	True if all values in items is in this collection.

ContainsCount(T)

Count the number of items of the collection equal to a particular value. Returns 0 if and only if the value is not in the collection.

Declaration

int ContainsCount(T item)

Parameters

Type	Name	Description
T	item	The value to count.

Returns

Type	Description
System.Int32	The number of copies found.

CopyTo(T[], Int32)

Copy the items of this collection to a contiguous part of an array.

Declaration

void CopyTo(T[] array, int index)

Parameters

Type	Name	Description
T[]	array	The array to copy to
System.Int32	index	The index at which to copy the first item

Find(ref T)

Check if this collection contains an item equivalent according to the itemequalityComparer to a particular value. If so, return in the ref argument (a binary copy of) the actual value found.

Declaration

bool Find(ref T item)

Parameters

Type	Name	Description
T	item	The value to look for.

Returns

Type	Description
System.Boolean	True if the items is in this collection.

FindOrAdd(ref T)

Check if this collection contains an item equivalent according to the itemequalityComparer to a particular value. If so, return in the ref argument (a binary copy of) the actual value found. Else, add the item to the collection.

Declaration

bool FindOrAdd(ref T item)

Parameters

Type	Name	Description
T	item	The value to look for.

Returns

Type	Description
System.Boolean	True if the item was found (hence not added).

GetUnsequencedHashCode()

The unordered collection hashcode is defined as the sum of

h(hashcode(item))

over the items

of the collection, where the function

h

is a function from int to int of the form

 t -> (a0*t+b0)^(a1*t+b1)^(a2*t+b2)

, where the ax and bx are the same for all collection classes.

The current implementation uses fixed values for the ax and bx, specified as constants in the code.

Declaration

int GetUnsequencedHashCode()

Returns

Type	Description
System.Int32	The unordered hashcode of this collection.

ItemMultiplicities()

Declaration

ICollectionValue<KeyValuePair<T, int>> ItemMultiplicities()

Returns

Type	Description
ICollectionValue<KeyValuePair<T, System.Int32>>

Remove(T)

Remove a particular item from this collection. If the collection has bag semantics only one copy equivalent to the supplied item is removed.

Declaration

bool Remove(T item)

Parameters

Type	Name	Description
T	item	The value to remove.

Returns

Type	Description
System.Boolean	True if the item was found (and removed).

Remove(T, out T)

Remove a particular item from this collection if found. If the collection has bag semantics only one copy equivalent to the supplied item is removed, which one is implementation dependent. If an item was removed, report a binary copy of the actual item removed in the argument.

Declaration

bool Remove(T item, out T removeditem)

Parameters

Type	Name	Description
T	item	The value to remove.
T	removeditem	The value removed if any.

Returns

Type	Description
System.Boolean	True if the item was found (and removed).

RemoveAll(IEnumerable<T>)

Remove all items in another collection from this one. If this collection has bag semantics, take multiplicities into account.

Declaration

void RemoveAll(IEnumerable<T> items)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	items	The items to remove.

RemoveAllCopies(T)

Remove all items equivalent to a given value.

Declaration

void RemoveAllCopies(T item)

Parameters

Type	Name	Description
T	item	The value to remove.

RetainAll(IEnumerable<T>)

Remove all items not in some other collection from this one. If this collection has bag semantics, take multiplicities into account.

Declaration

void RetainAll(IEnumerable<T> items)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	items	The items to retain.

UniqueItems()

Declaration

ICollectionValue<T> UniqueItems()

Returns

Type	Description
ICollectionValue<T>

UnsequencedEquals(ICollection<T>)

Compare the contents of this collection to another one without regards to the sequence order. The comparison will use this collection's itemequalityComparer to compare individual items.

Declaration

bool UnsequencedEquals(ICollection<T> otherCollection)

Parameters

Type	Name	Description
ICollection<T>	otherCollection	The collection to compare to.

Returns

Type	Description
System.Boolean	True if this collection and that contains the same items.

Update(T)

Check if this collection contains an item equivalent according to the itemequalityComparer to a particular value. If so, update the item in the collection with a (binary copy of) the supplied value. If the collection has bag semantics, it depends on the value of DuplicatesByCounting if this updates all equivalent copies in the collection or just one.

Declaration

bool Update(T item)

Parameters

Type	Name	Description
T	item	Value to update.

Returns

Type	Description
System.Boolean	True if the item was found and hence updated.

Update(T, out T)

Check if this collection contains an item equivalent according to the itemequalityComparer to a particular value. If so, update the item in the collection with a (binary copy of) the supplied value. If the collection has bag semantics, it depends on the value of DuplicatesByCounting if this updates all equivalent copies in the collection or just one.

Declaration

bool Update(T item, out T olditem)

Parameters

Type	Name	Description
T	item	Value to update.
T	olditem	On output the olditem, if found.

Returns

Type	Description
System.Boolean	True if the item was found and hence updated.

UpdateOrAdd(T)

Check if this collection contains an item equivalent according to the itemequalityComparer to a particular value. If so, update the item in the collection to with a binary copy of the supplied value; else add the value to the collection.

Declaration

bool UpdateOrAdd(T item)

Parameters

Type	Name	Description
T	item	Value to add or update.

Returns

Type	Description
System.Boolean	True if the item was found and updated (hence not added).

UpdateOrAdd(T, out T)

Check if this collection contains an item equivalent according to the itemequalityComparer to a particular value. If so, update the item in the collection to with a binary copy of the supplied value; else add the value to the collection.

Declaration

bool UpdateOrAdd(T item, out T olditem)

Parameters

Type	Name	Description
T	item	Value to add or update.
T	olditem	On output the olditem, if found.

Returns

Type	Description
System.Boolean	True if the item was found and updated (hence not added).

Extension Methods

EnumerableExtensions.InPairs<T, TOut>(IEnumerable<T>, Func<T, T, TOut>)

Number.IsNumber(Object)

SetExtensions.RemoveAll<T>(ICollection<T>, IEnumerable<T>)

SetExtensions.AddAll<T>(ICollection<T>, IEnumerable<T>)