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How to determine if a type implements an interface with C# reflection
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@PierreArnaud: IsAssignableFrom does eventually calls GetInterfaces, so probably your test checked the GetInterfaces first and IsAssignable after. That is because GetInterfaces caches it's results so the first invocation costs more
– Panos Theof
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What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phon
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Premature optimization is the root of all evil.
– Harindaka
Sep 11 '13 at 9:47
83
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Setting log level of message at runtime in slf4j
...j that can be efficiently mapped to the Level (or equivalent) type used in all of the possible logging implementations behind the facade. Alternatively, the designers decided that your use-case is too unusual to justify the overheads of supporting it.
Concerning @ripper234's use-case (unit testing...
mongoDB/mongoose: unique if not null
...ngoDB v1.8+ you can get the desired behavior of ensuring unique values but allowing multiple docs without the field by setting the sparse option to true when defining the index. As in:
email : {type: String, trim: true, index: true, unique: true, sparse: true}
Or in the shell:
db.users.ensureIn...
AngularJS - Value attribute on an input text box is ignored when there is a ng-model used?
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Vojta described the "Angular way", but if you really need to make this work, @urbanek recently posted a workaround using ng-init:
<input type="text" ng-model="rootFolders" ng-init="rootFolders='Bob'" value="Bob">
https://groups.google.com/d/msg/angular/Hn3eztNHFXw...
Checking the equality of two slices
...swer, and more highly voted is simply maddening...
– allyourcode
Feb 12 '15 at 7:54
5
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What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?
...ey are exact representations of the image. Bitmap formats such as BMP generally are uncompressed, although there also are compressed BMP files as well.
Lossy compression formats are generally suited for photographs. It is not suited for illustrations, drawings and text, as compression artifacts fro...
Long Press in JavaScript?
... Wouldn't this fire on a drag as well?
– Gallal
Aug 9 '12 at 17:18
11
@Gallal Presumab...
Is !important bad for performance?
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It shouldn't have any effect upon the performance really. Seeing firefox's CSS parser at /source/layout/style/nsCSSDataBlock.cpp#572 and I think that is the relevant routine, handling overwriting of CSS rules.
it just seems to be an simple check for "important".
if (aIsImp...
What is the purpose of the “Prefer 32-bit” setting in Visual Studio and how does it actually work?
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Microsoft has a blog entry What AnyCPU Really Means As Of .NET 4.5 and Visual Studio 11:
In .NET 4.5 and Visual Studio 11 the cheese has been moved. The
default for most .NET projects is again AnyCPU, but there is more than
one meaning to AnyCPU now. There i...