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What are the effects of exceptions on performance in Java?
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It depends how exceptions are implemented. The simplest way is using setjmp and longjmp. That means all registers of the CPU are written to the stack (which already takes some time) and possibly some other data needs to be created... all this already happens i...
Can hash tables really be O(1)?
...wledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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Many-to-many relationship with the same model in rails?
How can I make a many-to-many relationship with the same model in rails?
6 Answers
6
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reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
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There are numerous questions here. Considering them one at a time:
reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
Reference assignment is atomic. Interlocked.Exchange does not do only refe...
Difference between Mock / Stub / Spy in Spock test framework
...wler's website.
A mock is a dummy class replacing a real one, returning something like null or 0 for each method call. You use a mock if you need a dummy instance of a complex class which would otherwise use external resources like network connections, files or databases or maybe use dozens of othe...
Check if a class is derived from a generic class
... This is a sweet piece of code, I have to say. The while loop implementation avoids the unnecessary recursion performance hit also. It's an elegant and beautiful solution to a meta-generic question.
– EnocNRoll - AnandaGopal Pardue
Jan 19 '09 at 18:26
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Git for beginners: The definitive practical guide
...rent directory.
To make a new project, run git init with an additional argument (the name of the directory to be created):
git init project002
(This is equivalent to: mkdir project002 && cd project002 && git init)
To check if the current current path is within a git repository, sim...
Should I always use a parallel stream when possible?
...a sequential one. Coordinating the threads takes a significant amount of time. I would use sequential streams by default and only consider parallel ones if
I have a massive amount of items to process (or the processing of each item takes time and is parallelizable)
I have a performance problem in ...
What are the differences between Autotools, Cmake and Scons?
...r tests for "compatibility", etc.
If you're not paying attention, you will mess up cross-compilation ability (It
should clearly be noted that Nokia came up with Scratchbox/Scratchbox2 to side-step highly broken Autotools build setups for Maemo/Meego.) If you, for any reason, have fixed, static path...
List of Delphi language features and version in which they were introduced/deprecated
...onger uses ARC, it instead uses the default manual managed, which is the same as in the Windows compiler. This makes porting code from Windows or OSX to linux much easier.
Inline variables with automatic type inference
8 bit AnsiChar/AnsiString support in enable on Linux.
C++Builder and Delphi now u...