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How to perform element-wise multiplication of two lists?
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How do you downgrade rubygems?
...2 to 1.4.2 because of old rails version:
sudo gem update --system 1.4.2
More information about downgrading/upgrading rubygems: https://github.com/rubygems/rubygems/blob/master/UPGRADING.md
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How does the “final” keyword in Java work? (I can still modify an object.)
...roiddeveloper Nothing in Java can explicitly control stack/heap placement. More specifically, stack placement as decided by the HotSpot JIT compiler is subject to escape analysis, which is far more involved than checking whether a variable is final. Mutable objects can be stack-allocated as well. fi...
Are soft deletes a good idea? [duplicate]
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Static classes and methods in coffeescript
... But if we puts methods into 'this', they didn't be truly static anymore, isn't it? Truly static methods should stay in obj.prototype. In example of Shawn Mclean we may call methods like this: Box2DUtility::drawWorld(w,c);
– Sergei Panfilov
Oct 8 '14 at ...
right click context menu for datagridview
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Sorting related items in a Django template
...lf):
return self.attendee_set.order_by('last_name')
You could define more of these as you need them...
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How can I grep for a string that begins with a dash/hyphen?
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How to include “zero” / “0” results in COUNT aggregate?
...ll not count NULL values and thus you'll get a zero.
If you want to learn more about outer joins, here is a nice tutorial: http://sqlzoo.net/wiki/Using_Null
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Understanding garbage collection in .NET
...ables can get collected early, before the method finished executing. Even more powerfully, an object can get collected while one of its methods runs if that method no longer refers to this. There is a problem with that, it is very awkward to debug such a method. Since you may well put the variabl...