BlockVector<T>.IsMissing Method

public override bool IsMissing(
	int index
)

Public Overrides Function IsMissing ( 
	index As Integer
) As Boolean

public:
virtual bool IsMissing(
	int index
) override

abstract IsMissing : 
        index : int -> bool 
override IsMissing : 
        index : int -> bool 

Parameters

index  Int32

The zero-based index of the value to check.

Return Value

Implements

The base implementation uses the current MissingValue as an in-band value representation and compares the stored value returned by GetValue(Int32) with MissingValue.

A derived vector may override this method to use another missing-value representation. If the override uses a logical mask, index mask, or another representation that cannot be inferred from GetValue(Int32) and MissingValue, the derived type must also override MissingValueRepresentation consistently. Internal numerical algorithms use MissingValueRepresentation to determine whether explicit per-element missing inspection is required.

Reference