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Generic method multiple (OR) type constraint
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@Alex but that's not what C# does.
– Chris Pfohl
Jan 30 '18 at 19:05
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How to implement a rule engine?
... new Rule ( "Name", "Equal", "John"),
new Rule ( "Tags", "Contains", "C#" )
};
// compile the rules once
var compiledRules = rules.Select(r => CompileRule(r)).ToList();
public bool MatchesAllRules(User user)
{
return compiledRules.All(rule => rule(user));
}
Here is the implementati...
How can I divide two integers to get a double?
...ouble num3 = (double)num1/(double)num2;
Note: If any of the arguments in C# is a double, a double divide is used which results in a double. So, the following would work too:
double num3 = (double)num1/num2;
For more information see:
Dot Net Perls
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How to pass an ArrayList to a varargs method parameter?
... @JoshM. Java needs a lot of things. ;) I also (coming from a C# background) miss index operators. Working with dictionaries is much more smooth in C# than working with HashMaps in Java.
– Per Lundberg
Jan 15 '19 at 9:12
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How to implement Enums in Ruby?
... in Ruby? I'm looking for something which I can use (almost) like the Java/C# enums.
25 Answers
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Write a program that will surely go into deadlock [closed]
...o deadlock no matter how the threads are scheduled?
Here's an example in C#. Note that the program appears to contain no locks and no shared data. It has only a single local variable and three statements, and yet it deadlocks with 100% certainty. One would be hard-pressed to come up with a simpler...
How to return multiple values? [duplicate]
... from a method once-of-its-kind-it-the-program better to have Tuples. like c#. darling c# its a great language
– EKanadily
Aug 22 '15 at 22:41
1
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When to use thread pool in C#? [closed]
I have been trying to learn multi-threaded programming in C# and I am confused about when it is best to use a thread pool vs. create my own threads. One book recommends using a thread pool for small tasks only (whatever that means), but I can't seem to find any real guidelines. What are some consid...
Is there a more elegant way of adding an item to a Dictionary safely?
... between casting and using as for reference conversions.)
If you're using C# 3 and you have a distinct set of keys, you can make this even neater:
var currentViews = new Dictionary<string, object>()
{
{ "Customers", "view2" },
{ "Employees", "view1" },
{ "Reports", "view1" },
};
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Can a local variable's memory be accessed outside its scope?
...y-safe languages solve this problem by restricting your power. In "normal" C# there simply is no way to take the address of a local and return it or store it for later. You can take the address of a local, but the language is cleverly designed so that it is impossible to use it after the lifetime of...