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Which is more efficient: Multiple MySQL tables or one large table?
I store various user details in my MySQL database. Originally it was set up in various tables meaning data is linked with UserIds and outputting via sometimes complicated calls to display and manipulate the data as required. Setting up a new system, it almost makes sense to combine all of these tabl...
#define macro for debug printing in C?
...r macro
else
do_something_useful(x, y);
And the else is now a syntax error. The do { ... } while(0) loop avoids both these problems.
There's one other way of writing the macro which might work:
/* BAD - BAD - BAD */
#define debug_print(...) \
((void)((DEBUG) ? fprintf(stderr, __...
How to get the nvidia driver version from the command line?
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In my centos 6.4 system, it gives me error as "-bash: nvidia-smi: command not found". What might be the problem ?
– Shyamkkhadka
Mar 5 '17 at 10:03
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How can I make an “are you sure” prompt in a Windows batchfile?
...ers read from STDIN) specified after option /C (and Ctrl+C) and outputs an error beep if the user presses a wrong key.
CHOICE does not require pressing any other key than one of the acceptable ones. CHOICE exits immediately once an acceptable key is pressed while SET /P requires that the user finish...
How to apply a function to two columns of Pandas dataframe
...]:x[2] + 1] and df['col_3'] = df.apply(get_sublist, axis=1) gives 'ValueError: operands could not be broadcast together with shapes (2) (3)'
– bigbug
Nov 16 '12 at 7:11
4
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Creating an abstract class in Objective-C
...NSInvalidAbstractInvocation(). Calling an abstract method is a programming error, which is why it throws an exception. Abstract factories are commonly implemented as class clusters.
– quellish
Aug 2 '14 at 23:40
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How can I setup & run PhantomJS on Ubuntu?
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I ran into this issue: bin/phantomjs: error while loading shared libraries: libfontconfig.so.1: cannot open shared object file: No such file or directory. I found a fix here. Run the command: sudo apt-get install libfontconfig
– Neil Hoff
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Access Enum value using EL with JSTL
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A good thing about this solution is that you get an error message if there is a mistake in your expression, which does not always happen with <c:if> and <c:when> (they fail quietly).
– vegemite4me
Oct 14 '15 at 8:19
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Socket.io rooms difference between broadcast.to and sockets.in
Socket.io's readme contains the following example:
5 Answers
5
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How do I assert equality on two classes without an equals method?
...u don't have to pull in yet another test framework and it'll give a useful error when the assert fails (expected: field=<value> but was field=<something else>) instead of expected: true but was false if you use something like EqualsBuilder.reflectionEquals().
The downside is that it is ...