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javascript check for not null
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while technically this works, a double not (!!) is a programming faux-pas. It is really the equivalent of if(val), which is much clearer to read. I would stick to that (fyi Ujwal, !!val should technically work in C or C++ also) see here f...
Regular expression to match DNS hostname or IP Address?
...o be escaped with \.
ValidHostnameRegex is valid as per RFC 1123. Originally, RFC 952 specified that hostname segments could not start with a digit.
http://en.wikipedia.org/wiki/Hostname
The original specification of
hostnames in RFC
952,
mandated that labels could not start
with a d...
How can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
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edited Dec 22 '15 at 16:32
Brett Wolfington
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an...
What does SQL clause “GROUP BY 1” mean?
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answered Dec 19 '14 at 18:32
wdoeringwdoering
18033 silver badges1515 bronze badges
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How do I create a datetime in Python from milliseconds?
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vartecvartec
113k3232 gold badges197197 silver badges234234 bronze badges
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Add a new line in file?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to get the PATH environment-variable separator in Python?
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32
It is os.pathsep
sh...
What is a smart pointer and when should I use one?
...of the object being pointed to. There is no single smart pointer type, but all of them try to abstract a raw pointer in a practical way.
Smart pointers should be preferred over raw pointers. If you feel you need to use pointers (first consider if you really do), you would normally want to use a sma...
Regular expression to match a dot
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ZibriZibri
6,33222 gold badges3535 silver badges3434 bronze badges
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Copy table without copying data
...here 1=0
– Andomar
Jan 21 '11 at 12:32
29
This does not seem to copy the constraints or keys
...