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What is the difference between HashSet and List?
... what is the difference between HashSet<T> and List<T> in .NET?
8 Answers
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Fastest way to check if string contains only digits
...g.Join("\n", ss)); return;
}
Results on Intel i5-3470 @ 3.2GHz, VS 2015 .NET 4.6.1 Release mode and optimizations enabled:
time method ratio
0.7776 for ^ 1.0000
0.7984 foreach - 1.0268
0.8066 foreach ^ 1.0372
0.8940 for - 1.1497
0.8976 for ...
What does the 'static' keyword do in a class?
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In .NET, you can also modify this behavior using the [ThreadStatic] attribute - which makes the static local to particular threads.
– TheSoftwareJedi
Jan 5 '09 at 18:44
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Is there a way to check if int is legal enum in C#?
...ng() ==> "20"
With these two rules in mind we can assume that if the .NET Framework does its job correctly that any calls to a valid enum's ToString() method will result in something that has an alphabetic character as its first character:
public static bool IsValid<TEnum>(this TEnum enu...
Android - Pulling SQlite database android device
...able, you can use "Android Backup Extractor" Java Application (sourceforge.net/projects/adbextractor). See forum.xda-developers.com/showthread.php?t=2011811 for the commands to unpack the .ab file.
– lalitm
Apr 2 '14 at 9:55
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ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
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If you use a / it is a net service name, if you use a colon it is a SID.
– eckes
Jul 13 '15 at 15:31
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Calculate age given the birth date in the format YYYYMMDD
...at looked crude on your code was the substr part.
Fiddle: http://jsfiddle.net/codeandcloud/n33RJ/
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Case insensitive string compare in LINQ-to-SQL
...ng. 1) Strings themselves can't be case-insensitive or case-sensitive in .NET, so I can't pass a "case-insensitive string". 2) A LINQ query basically IS a lambda expression, and that's how I'm passing my two strings, so this doesn't make any sense to me.
– BlueMonkMN
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Hidden Features of JavaScript? [closed]
... It also works in Visual Studio as well, if you develop on ASP.NET :)
– chakrit
Mar 23 '10 at 13:13
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Why there is no ForEach extension method on IEnumerable?
...They both use a plain for loop. Maybe it's a performance thing (diditwith.net/2006/10/05/PerformanceOfForeachVsListForEach.aspx). But given that, Array and List both implement ForEach methods, it's surprising that they didn't at least implement an extension method for IList<>, if not for IEn...