private static void LoadFrontBlockNode(FileDefPattern pattern, XPathNodeIterator patterns)
{
while (patterns.MoveNext())
{
if (patterns.Current != null)
{
SomePattern somePattern = new SomePattern {
Pos = int.Parse(patterns.Current.SelectSingleNode("Pos")?.Value.Trim() ?? "0")
};
string innerText = patterns.Current.SelectSingleNode("Bytes")?.Value.Trim();
if (innerText != null)
{
somePattern.Len = innerText.Length / 2;
somePattern.Pattern = new byte[somePattern.Len + 1];
for (int i = 1; i <= somePattern.Len; i++)
{
somePattern.Pattern[i - 1] = (byte)Math.Round((double)int.Parse(innerText.Substring((i - 1) * 2, 2), NumberStyles.HexNumber));
}
}
pattern.FrontBlockSize = somePattern.Pos + somePattern.Len;
somePattern.XM = false;
somePattern.Points = 1;
if (somePattern.Pos == 0)
{
somePattern.Points = 1000;
}
pattern.Patterns.Add(somePattern);
}
}
}
static void Main(string[] args)
{
int x = 10;
int y = 20;
// Calling a named method.
int r = AddNumbers(x, y);
Console.WriteLine(r);
// Calling a Lambda Expression.
// Dear Compiler, write me a new method (I don't care about it's real name, keep that to yourself - but I'll just refer to it as "blah") that does the following:-
// 1. Has the same method signature as "SomePattern", i.e. takes two integers and returns an integer.
// 2. You can call the input parameters (p1 & p2).
// 3. Now write a body for the method (the bit after the =>) that adds those two parameters together.
// 4. Now somehow convert the result of that body into an int and return that.
SomePattern blah = (p1, p2) => p1 + p2;
// Hey Compiler, you know that funtion you created earlier that I called "blah"? Let me call it passing in a couple of values:-
int r1 = blah(x, y);
Console.WriteLine(r1);
// We can also include intermediate steps if need be.
// Try to keep these sorts of lamda short.
SomePattern blah2 = (x, y) =>
{
int aa = 2 * x;
int bb = 3 * y;
return(aa * bb);
};
int r2 = blah2(x, y);
Console.WriteLine(r2);
// In order to use Lambdas, you need to first define a delegate e.g. SomePattern as seen in line 9.
// However the .Net Framework defines a whole load for you, e.g.
// public delegate TResult Func<TResult>();
// public delegate TResult Func<T,TResult>(T arg);
// public delegate TResult Func<T1, T2, TResult>(T1 arg1, T2 arg2);
// all the way up to:-
// public delegate TResult Func<T1, T2, T3, T4, TResult>(T1 arg1, T2 arg2, T3 arg3, T4 arg4);
//
// This means you can use Lambdas without having to define your own delegate type, e.g.
Func <int, int, int> blah3 = (p1, p2) => p1 + p2;
int r3 = blah3(x, y);
Console.WriteLine(r3);
// There are other system supplied delegates:-
// A Predicate takes one input and returns a bool.
// public delegate bool Predicate<T>(T arg);
Predicate <DateTime> p = input => input.DayOfWeek == DayOfWeek.Tuesday;
bool todayIsTuesday = p(DateTime.Now);
Console.WriteLine("Today is Tuesday = {0}", todayIsTuesday);
// There are also "Action" delegates, these work just like Func but always return void (i.e. don't have a TResult), e.g.
// public delegate void Action<T>(T arg);
Action <string> blah4 = (s1) => Console.WriteLine("You passed the string: {0}", s1);
blah4("hello world");
}