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GCC dump preprocessor defines
...ocessor defines are dependent on command line options - you can test these by adding the relevant options to the above command line. For example, to see which SSE3/SSE4 options are enabled by default:
$ gcc -dM -E - < /dev/null | grep SSE[34]
#define __SSE3__ 1
#define __SSSE3__ 1
and then com...
git shallow clone (clone --depth) misses remote branches
After cloning a remote repository it does not show any remote branch by -a option. What could be the problem? How to debug it? In this snippet two of the remote branches are not shown:
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What's the opposite of 'make install', i.e. how do you uninstall a library in Linux?
... +1; Watch out for files that might also have been installed by other packages. Simply deleting these files (one interpretation of "manually reversing those steps") could break the other packages. This is (one of many reasons) why package managers were invented.
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What is the difference between gmake and make?
... make implementations of various commercial unixes.
The language accepted by GNU make is a superset of the one supported by the traditional make utility.
By using 'gmake' specifically you can use GNU make extensions without worrying about them being misinterpreted by some other make implementation...
What are the functional differences between NW.js, Brackets-Shell and Electron?
.... They are very clear that "The brackets-shell is only maintained for use by the Brackets project ", that screams run away to me.
https://github.com/adobe/brackets-shell#overview
Atom-shell seems to be recently active, but it seems much like brackets in that they are really writing and editor/IDE...
Random record in ActiveRecord
...del.first(:offset => offset)
To be honest, I've just been using ORDER BY RAND() or RANDOM() (depending on the database). It's not a performance issue if you don't have a performance issue.
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foreach vs someList.ForEach(){}
...ompiler manages to use a faster technique, then you will get this for free by using foreach and rebuilding, rather than changing your code.
a foreach(item in list) construct allows you to use break or continue if you need to exit the iteration or the loop. But you cannot alter the list inside a for...
How to subtract X days from a date using Java calendar?
... subtract 5 days from the current time of the calendar, you can achieve it by calling:
Calendar calendar = Calendar.getInstance(); // this would default to now
calendar.add(Calendar.DAY_OF_MONTH, -5).
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How to find gaps in sequential numbering in mysql?
...h line). 1st query: 2812 rows in set (1 min 31.09 sec). Made another table by selecting distinct order numbers. Your query without my repeats: 1009 rows in set (18.04 sec)
– Chris K
Jun 6 '13 at 19:54
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Hibernate, @SequenceGenerator and allocationSize
...nate when using @SequenceGenerator - it increases real database sequence by one , multiple this value by 50 (default allocationSize value) - and then uses this value as entity ID.
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