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Cleaner way to do a null check in C#? [duplicate]
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In a generic way, you may use an expression tree and check with an extension method:
if (!person.IsNull(p => p.contact.address.city))
{
//Nothing is null
}
Full code:
public class IsNullVisitor : ExpressionVisitor
{
public bool IsNull { get; private set; }
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What is the most elegant way to remove a path from the $PATH variable in Bash?
... @Martin: POSIX does not require this behavior, but does document and allow it: pubs.opengroup.org/onlinepubs/9699919799/basedefs/…
– Fred Foo
Mar 13 '11 at 23:04
1
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Use LINQ to get items in one List, that are not in another List
...p2.ID != p.ID));
Warning: As noted in the comments, these approaches mandate an O(n*m) operation. That may be fine, but could introduce performance issues, and especially if the data set is quite large. If this doesn't satisfy your performance requirements, you may need to evaluate other option...
Optimal way to concatenate/aggregate strings
...on to facilitate this would be nice. I've tried solutions using COALESCE and FOR XML , but they just don't cut it for me.
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Combining two expressions (Expression)
I have two expressions of type Expression<Func<T, bool>> and I want to take to OR, AND or NOT of these and get a new expression of the same type
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How to detect if my shell script is running through a pipe?
How do I detect from within a shell script if its standard output is being sent to a terminal or if it's piped to another process?
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What is Func, how and when is it used
What is Func<> and what is it used for?
7 Answers
7
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List the queries running on SQL Server
...ly running on MS SQL Server (either through the Enterprise Manager or SQL) and/or who's connected?
17 Answers
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How to wait for several Futures?
Suppose I have several futures and need to wait until either any of them fails or all of them succeed.
8 Answers
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LINQ - Left Join, Group By, and Count
...;t.ChildID != null didn't work for me. The result was always a null object and Resharper complained that the expression was always true. So I used (t => t != null) and that worked for me.
– Joe
Dec 2 '10 at 1:35
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