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George L. Jackson - Professional Profile


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M.A., Penn State


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GeneralExample of Creating a Collection in C++/CLI with a Built-in Predicate Pin
George L. Jackson3-Aug-07 14:25
George L. Jackson3-Aug-07 14:25 
GeneralC++/CLI and Inheriting from Generic Interfaces Pin
George L. Jackson3-Aug-07 13:47
George L. Jackson3-Aug-07 13:47 
GeneralC++/CLI and System.Predicate delegate [modified] Pin
George L. Jackson18-Jul-07 15:34
George L. Jackson18-Jul-07 15:34 
The array<T> and List<T> classes use the Predicate<T> delegate that represents a function or method used for filtering data. In C++/CLI, I have found a little trick where you can pass in your limiting values into any of the above classes' methods that require this delegate in one line:
using namespace System;
ref class Compare
	Compare(int lowerLimit, int upperLimit) 
		: lower(lowerLimit), upper(upperLimit) {}
	bool Between(int value)
		return value >= lower && value <= upper;
	int lower;
	int upper;
int main(array<System::String ^> ^args)
	array<int>^ values = { 8, 12, 18, 23, 24, 31, 42, 52, 65, 99, 101 };
	array<int>^ results = array<int>::FindAll(values, 
		gcnew <span style="color: navy; font-weight: bolder">Predicate<int>(gcnew Compare(21, 65), &Compare::Between)</span>);
	for each (int result in results)
    return 0;
This isn't any jaw-dropping code; however, you can not do that in C#!

-- modified at 21:52 Tuesday 24th July, 2007

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