ERXArrayUtilities.AvgNonNullOperator Class Reference

List of all members.

Public Member Functions
	AvgNonNullOperator ()
Object	compute (NSArray<?> array, String keypath)

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Detailed Description

Define an NSArray.Operator for the key avgNonNull.

This allows for key value paths like:

• myArray.valueForKey("@avgNonNull.payment.amount");
• myArray.valueForKey("payment.@avgNonNull.amount");
• myArray.valueForKey("payment.amount.@avgNonNull");

which will sum up all values for the key amount and divide by the number of nun-null entries. applies to the array of objects to its left if it is the last key in the path. Otherwise it applies to the end of the keypath to its right. It should not be followed by an array or any other array operators. This is because it does not call valueForKeyPath on the array to its left, but instead loops through the values of the array to its left, calling valueForKeyPath on the individual array values instead. This behavior is consistent with Apple's standard NSArray operators.

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Constructor & Destructor Documentation

AvgNonNullOperator

(

)

public empty constructor

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Member Function Documentation

Object compute	(	NSArray<?>	array,
		String	keypath
	)

returns the average value for over all non-null values.

Parameters:

	array	array to be checked.
	keypath	path to numeric values

Returns:

computed average as BigDecimal or NULL.

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The documentation for this class was generated from the following file:

• /opt/source/Wonder/Frameworks/Core/ERExtensions/Sources/er/extensions/foundation/ERXArrayUtilities.java