Gemstone Common Library
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# ArrayExtensionsCountOfSequence T(T, T, Int32, Int32) Method

Searches for the specified sequenceToCount and returns the occurrence count within the range of elements in the array that starts at the specified index and contains the specified number of elements.

## Definition

Namespace: Gemstone.ArrayExtensions
Assembly: Gemstone.Common (in Gemstone.Common.dll) Version: 1.0.159 -- Release Build+a612c25bc0e1c87e5766544ec4650d2ebcfddcf4
C#
View Source Request Example

    public static int CountOfSequence<T>(
    	this T[] array,
    	T[] sequenceToCount,
    	int startIndex,
    	int searchLength
    )
    where T : Object, IComparable<T>

VB
View Source Request Example

    <ExtensionAttribute>
    Public Shared Function CountOfSequence(Of T As {Object, IComparable(Of T)}) (
    	array As T(),
    	sequenceToCount As T(),
    	startIndex As Integer,
    	searchLength As Integer
    ) As Integer

C++
View Source Request Example

    public:
    [ExtensionAttribute]
    generic<typename T>
    where T : Object, IComparable<T>
    static int CountOfSequence(
    	array<T>^ array,
    	array<T>^ sequenceToCount,
    	int startIndex,
    	int searchLength
    )

JavaScript
View Source Request Example

    JavaScript does not support generic types or methods.

#### Parameters

array T
  Array to search.
sequenceToCount T
  Sequence of items to search for.
startIndex Int32
  Start index in the array to start searching.
searchLength Int32
  Number of bytes in the array to search through.

#### Type Parameters

T
  Type of array.

#### Return Value

Int32
The occurrence count of the sequenceToCount in the array, if found; otherwise, -1.

#### Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type T. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

## Exceptions

ArgumentNullException | sequenceToCount is null or has zero length.
ArgumentOutOfRangeException | startIndex is outside the range of valid indexes for the source array -or- searchLength is less than 0.

## See Also

#### Reference

ArrayExtensions Class
CountOfSequence Overload
Gemstone.ArrayExtensions Namespace