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DQ_Count ( deque )

Returns the number of items in a deque (stack, queue)

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Stephen Hanna Stephen J. Hanna Consulting http://www.sjhanna.com

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

// D E Q U E M A N I P U L A T I O N F U N C T I O N S // // Function Name: DQ_Count // Parameters: deque The name (as a text string) of the global variable containing the list of values // Returns: The number of values in the list specified by deque // Side Effects: none // Exceptions: If deque does not contain a valid variable name, returns '?' // ValueCount( Evaluate( deque ) ) Click to copy

This is the "count" function of the DeQue (double-ended queue) function package. It returns the number of items in the specified DeQue. See DQ_New() for a complete description.

Typical usage scenario:

Set Variable [ $myDeque ; DQ_New ( "apple " ) ]
Set Variable [ $dummy ; DQ_Push ( $myDeque ; "banana" ) ]
Set Variable [ $dummy ; DQ_Put ( $myDeque ; "kumquat" ) ]
Set Variable ( $count ; DQ_Count ( $myDeque ) ] // $count = 3

 

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