er.extensions.foundation
Class ERXArrayUtilities.AvgNonNullOperator

java.lang.Object
  er.extensions.foundation.ERXArrayUtilities.AvgNonNullOperator

All Implemented Interfaces:

NSArray.Operator

Enclosing class:

ERXArrayUtilities

public static class ERXArrayUtilities.AvgNonNullOperator
extends Object
implements NSArray.Operator

Define an NSArray.Operator for the key avgNonNull.

This allows for key value paths like:

myArray.valueForKey("@avgNonNull.revenue");

which will sum up all values and divide by the number of nun-null entries.

Constructor Summary

ERXArrayUtilities.AvgNonNullOperator()
public empty constructor

Method Summary

Object

compute(NSArray array, String keypath) returns the average value for over all non-null values.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ERXArrayUtilities.AvgNonNullOperator

public ERXArrayUtilities.AvgNonNullOperator()

public empty constructor

Method Detail

compute

public Object compute(NSArray array,
                      String keypath)

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

Specified by:

compute in interface NSArray.Operator

Parameters:

array - array to be checked.

keypath - value of average.

Returns:

computed average as double or NULL.