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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...he tendency to generate noticeably faster code if I optimize for size ( -Os ) instead of speed ( -O2 or -O3 ), and I have been wondering ever since why.
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Open file dialog and select a file using WPF controls and C#
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Community♦
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answered Apr 25 '12 at 12:08
Klaus78Klaus78
10.7k55 gold badg...
How to find the operating system version using JavaScript?
...te gives you the Windows version. Also, you should know that:
'Windows 3.11' => 'Win16',
'Windows 95' => '(Windows 95)|(Win95)|(Windows_95)',
'Windows 98' => '(Windows 98)|(Win98)',
'Windows 2000' => '(Windows NT 5.0)|(Windows 2000)',
'Windows XP' => '(Windows NT 5.1)|(Windows XP)',...
MAC下如何删除NTFS格式U盘的东西？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...除NTFS格式U盘的东西？mac上只提供了它自身磁盘格式（mac os 扩展日子）等的读写权限，只提供了读的权限给NTFS、FAT32给硬盘和U盘，我们99%使用的硬盘和U盘都是...mac上只提供了它自身磁盘格式（mac os 扩展日子）等的读写权限，只...
A semantics for Bash scripts?
...e:
Positional parameters are not sparse. If $12 is set, you can be sure $11 is set, too. (It could be set to the empty string, but $# will not be smaller than 12.) If "${arr[12]}" is set, there's no guarantee that "${arr[11]}" is set, and the length of the array could be as small as 1.
The zeroth ...
In Windows Azure: What are web role, worker role and VM role?
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answered Aug 19 '11 at 12:54
David MakogonDavid Makogon
62.8k1717 gold badges121121 silver badges171171 bronze badges
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Simplest way to detect a mobile device in PHP
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Where is Python's sys.path initialized from?
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djhaskin987djhaskin987
8,03611 gold badge4242 silver badges7777 bronze badges
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GLib compile error (ffi.h), but libffi is installed
... Eric Milliot-MartinezEric Milliot-Martinez
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Using awk to remove the Byte-order mark
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115
Try this:
awk 'NR==1{sub(/^\xef\xbb\xbf/,"")}{print}' INFILE > OUTFILE
On the first reco...