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What's the simplest way to test whether a number is a power of 2 in C++?
... (n - 1)) == 0 is best. However, note that it will incorrectly return true for n=0, so if that is possible, you will want to check for it explicitly.
http://www.graphics.stanford.edu/~seander/bithacks.html has a large collection of clever bit-twiddling algorithms, including this one.
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The identity used to sign the executable is no longer valid
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Try restarting XCode. It worked for me.
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Android - how do I investigate an ANR?
...sponding). I took a look at the traces.txt file in /data and I see a trace for my application. This is what I see in the trace.
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Prevent direct access to a php include file
I have a php file which I will be using as exclusively as an include. Therefore I would like to throw an error instead of executing it when it's accessed directly by typing in the URL instead of being included.
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How can I see the size of files and directories in linux? [closed]
...df -m , then it shows the size of all the directory at the top level, but, for the directories and files inside the directory, how do I check the size?
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How to get the last character of a string in a shell?
...1}"
Otherwise, bash expands the variable and in this case does globbing before printing out. It is also better to quote the parameter to the script (in case you have a matching filename):
sh lash_ch.sh 'abcde*'
Also see the order of expansions in the bash reference manual. Variables are expanded b...
iTextSharp - Sending in-memory pdf in an email attachment
...orrectly, this solved a similar problem in a previous project.
See http://forums.asp.net/t/1093198.aspx
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How do you see the entire command history in interactive Python?
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See answer by @dennis Golomazov, for an even better answer.
– macetw
Sep 23 at 16:45
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How can I scan barcodes on iOS?
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We produced the 'Barcodes' application for the iPhone. It can decode QR Codes. The source code is available from the zxing project; specifically, you want to take a look at the iPhone client and the partial C++ port of the core library. The port is a little old, f...
How do you move a file?
I'm using TortoiseSVN against the SourceForge SVN repository. I'd like to move a file from one folder to another in order to maintain its revision history. Is this possible? If so, how do you do it?
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