Struct NativeHashMap<TKey, TValue> | Collections | 0.6.0-preview.9
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    Struct NativeHashMap<TKey, TValue>

    Unordered associative array, a collection of keys and values.

    Namespace: Unity.Collections
    Syntax
    public struct NativeHashMap<TKey, TValue> : IDisposable where TKey : struct, IEquatable<TKey> where TValue : struct
    Type Parameters
    Name Description
    TKey

    The type of the keys in the container.

    TValue

    The type of the values in the container.

    Constructors

    NativeHashMap(Int32, Allocator)

    Constructs a new container with the specified initial capacity and type of memory allocation.

    Declaration
    public NativeHashMap(int capacity, Allocator allocator)
    Parameters
    Type Name Description
    Int32 capacity

    The initial capacity of the container. If the list grows larger than its capacity, the internal array is copied to a new, larger array.

    Allocator allocator

    A member of the Unity.Collections.Allocator enumeration.

    Properties

    Capacity

    The number of items that can fit in the container.

    Declaration
    public int Capacity { get; set; }
    Property Value
    Type Description
    Int32

    The number of items that the container can hold before it resizes its internal storage.

    Remarks

    Capacity specifies the number of items the container can currently hold. You can change Capacity to fit more or fewer items. Changing Capacity creates a new array of the specified size, copies the old array to the new one, and then deallocates the original array memory.

    IsCreated

    Reports whether memory for the container is allocated.

    Declaration
    public bool IsCreated { get; }
    Property Value
    Type Description
    Boolean

    True if this container object's internal storage has been allocated.

    Remarks

    Note that the container storage is not created if you use the default constructor. You must specify at least an allocation type to construct a usable container.

    Item[TKey]

    Retrieve a value by key.

    Declaration
    public TValue this[TKey key] { get; set; }
    Parameters
    Type Name Description
    TKey key
    Property Value
    Type Description
    TValue

    Length

    The current number of items in the container.

    Declaration
    public int Length { get; }
    Property Value
    Type Description
    Int32

    The item count.

    Methods

    Add(TKey, TValue)

    Add an element with the specified key and value into the container. If the key already exist an ArgumentException will be thrown.

    Declaration
    public void Add(TKey key, TValue value)
    Parameters
    Type Name Description
    TKey key

    The key of the element to add.

    TValue value

    The value of the element to add.

    AsParallelWriter()

    Returns parallel writer instance.

    Declaration
    public NativeHashMap<TKey, TValue>.ParallelWriter AsParallelWriter()
    Returns
    Type Description
    NativeHashMap.ParallelWriter<>

    Clear()

    Clears the container.

    Declaration
    public void Clear()
    Remarks

    Containers capacity remains unchanged.

    ContainsKey(TKey)

    Determines whether an key is in the container.

    Declaration
    public bool ContainsKey(TKey key)
    Parameters
    Type Name Description
    TKey key

    The key to locate in the container.

    Returns
    Type Description
    Boolean

    Returns true if the container contains the key.

    Dispose()

    Disposes of this container and deallocates its memory immediately.

    Declaration
    public void Dispose()

    Dispose(JobHandle)

    Safely disposes of this container and deallocates its memory when the jobs that use it have completed.

    Declaration
    public JobHandle Dispose(JobHandle inputDeps)
    Parameters
    Type Name Description
    JobHandle inputDeps

    The job handle or handles for any scheduled jobs that use this container.

    Returns
    Type Description
    JobHandle

    A new job handle containing the prior handles as well as the handle for the job that deletes the container.

    Remarks

    You can call this function dispose of the container immediately after scheduling the job. Pass the JobHandle returned by the Job.Schedule method using the jobHandle parameter so the job scheduler can dispose the container after all jobs using it have run.

    GetKeyArray(Allocator)

    Retrive array of key from the container.

    Declaration
    public NativeArray<TKey> GetKeyArray(Allocator allocator)
    Parameters
    Type Name Description
    Allocator allocator

    A member of the Unity.Collections.Allocator enumeration.

    Returns
    Type Description
    NativeArray<TKey>

    Key array.

    GetKeyValueArrays(Allocator)

    Retrieve key/value arrays.

    Declaration
    public NativeKeyValueArrays<TKey, TValue> GetKeyValueArrays(Allocator allocator)
    Parameters
    Type Name Description
    Allocator allocator

    A member of the Unity.Collections.Allocator enumeration.

    Returns
    Type Description
    NativeKeyValueArrays<TKey, TValue>

    Key/value arrays.

    GetValueArray(Allocator)

    Retreive array of values from the container.

    Declaration
    public NativeArray<TValue> GetValueArray(Allocator allocator)
    Parameters
    Type Name Description
    Allocator allocator

    A member of the Unity.Collections.Allocator enumeration.

    Returns
    Type Description
    NativeArray<TValue>

    Value array.

    Remove(TKey)

    Removes the element with the specified key from the container.

    Declaration
    public bool Remove(TKey key)
    Parameters
    Type Name Description
    TKey key

    The key of the element to remove.

    Returns
    Type Description
    Boolean

    Returns true if the key was removed from the container, otherwise returns false indicating key wasn't in the container.

    TryAdd(TKey, TValue)

    Try adding an element with the specified key and value into the container. If the key already exist, the value won't be updated.

    Declaration
    public bool TryAdd(TKey key, TValue value)
    Parameters
    Type Name Description
    TKey key

    The key of the element to add.

    TValue value

    The value of the element to add.

    Returns
    Type Description
    Boolean

    Returns true if value is added into the container, otherwise returns false.

    TryGetValue(TKey, out TValue)

    Gets the value associated with the specified key.

    Declaration
    public bool TryGetValue(TKey key, out TValue item)
    Parameters
    Type Name Description
    TKey key

    The key of the value to get.

    TValue item

    If key is found item parameter will contain value

    Returns
    Type Description
    Boolean

    Returns true if key is found, otherwise returns false.

    Extension Methods

    JobNativeMultiHashMapVisitKeyValue.Schedule<TJob, TKey, TValue>(TJob, NativeMultiHashMap<TKey, TValue>, Int32, JobHandle)
    JobNativeMultiHashMapVisitKeyMutableValue.Schedule<TJob, TKey, TValue>(TJob, NativeMultiHashMap<TKey, TValue>, Int32, JobHandle)
    JobUnsafeMultiHashMapVisitKeyValue.Schedule<TJob, TKey, TValue>(TJob, UnsafeMultiHashMap<TKey, TValue>, Int32, JobHandle)
    JobUnsafeMultiHashMapVisitKeyMutableValue.Schedule<TJob, TKey, TValue>(TJob, UnsafeMultiHashMap<TKey, TValue>, Int32, JobHandle)
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