Wanted to do a refresher on delegates before learning more about LINQ
delegate void Callback();
void Main()
{
MakeRequest(AfterRequest2);
}
private void MakeRequest(Callback callback)
{
"Request Made".Dump();
callback();
}
private void AfterRequest()
{
"Stuff done after request".Dump();
}
private void AfterRequest2()
{
"Different stuff done after request".Dump();
}
Here is another sample I played with. This one uses anonymous delegates and outer variables.
delegate bool GreaterThanHandler (int first, int second);
void BubbleSort(int[] items, GreaterThanHandler greaterThan)
{
int i;
int j;
int temp;
for (i = items.Length - 1; i >= 0; i--)
{
for (j = 1; j <= i; j++)
{
if (greaterThan(items[j - 1], items[j]))
{
temp = items[j - 1];
items[j - 1] = items[j];
items[j] = temp;
}
}
}
}
bool GreaterThan(int first, int second)
{
return (first > second);
}
bool LessThan(int first, int second)
{
return (first < second);
}
void Main()
{
int i;
int[] items = new int[] { 1,2,3,4,5 };
int swapCount = 0;
BubbleSort(items, delegate(int first, int second)
{
bool swap = (first > second % 2);
if (swap) swapCount++;
return swap;
});
for (i = 0; i < items.Length; i++)
{
items[i].Dump();
}
"Number of swaps: ".Dump();
swapCount.Dump();
}