大约有 32,000 项符合查询结果(耗时:0.0908秒) [XML]

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Css height in percent not working [duplicate]

... You need to set a 100% height on all your parent elements, in this case your body and html. This fiddle shows it working. html, body { height: 100%; width: 100%; margin: 0; } div { height: 100%; width: 100%; background: #F52887; } <html><body...
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count(*) vs count(column-name) - which is more correct? [duplicate]

... COUNT(*) counts all rows COUNT(column) counts non-NULLs only COUNT(1) is the same as COUNT(*) because 1 is a non-null expressions Your use of COUNT(*) or COUNT(column) should be based on the desired output only. ...
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Check if a class has a member function of a given signature

...oid ReportMemUsage(const TMap& m, std::true_type) { // We may call used_memory() on m here. } template<typename TMap> void ReportMemUsage(const TMap&, std::false_type) { } template<typename TMap> void ReportMemUsage(const TMap& m) { ReportMemUsage(m, std:...
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How do I show a Save As dialog in WPF?

...alog dialog = new SaveFileDialog() { Filter = "Text Files(*.txt)|*.txt|All(*.*)|*" }; if (dialog.ShowDialog() == true) { File.WriteAllText(dialog.FileName, fileText); } share | improve th...
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Is there any way to view the currently mapped keys in Vim?

Basically, I'd like to view all of the keys maps made in the current buffer by all of plugins, vimrc, etc, in the current buffer. Is there anyway to do this? ...
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How do cache lines work?

...hyperthreading is way better than in P4 days (so a prefetch thread is typically a waste). Also, the x86 tag wiki has lots of performance links for that architecture. share | improve this answer ...
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Does Python have a package/module management system?

...agement system, similar to how Ruby has rubygems where you can do gem install packagename ? 13 Answers ...
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How can I use NSError in my iPhone App?

... Well, what I usually do is have my methods that could error-out at runtime take a reference to a NSError pointer. If something does indeed go wrong in that method, I can populate the NSError reference with error data and return nil from the ...
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Is there a “goto” statement in bash?

...atement in bash ? I know It is considered bad practice, but I need specifically "goto". 12 Answers ...
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Create a shortcut on Desktop

... This was really close for me. I needed to add the .exe's directory to the "WorkingDirectory" property on shortcut. (shortcut.WorkingDirectory) +1 – samuelesque May 16 '14 at 19:11 ...