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Postgres unique constraint vs index
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One more advantage of using UNIQUE INDEX vs. UNIQUE CONSTRAINT is that you can easily DROP/CREATE an index CONCURRENTLY, whereas with a constraint you can't.
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Floating point vs integer calculations on modern hardware
...d and MSVC will not generate code for it, so it compiles using mulss and divss XMM instructions there, which are 25x faster than the FPU in Win32. Test machine is Core i5 M 520 @ 2.40GHz
– James Dunne
Jan 2 '13 at 18:28
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Java or Python for Natural Language Processing [closed]
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Java vs Python for NLP is very much a preference or necessity. Depending on the company/projects you'll need to use one or the other and often there isn't much of a choice unless you're heading a project.
Other than NLTK (www.nlt...
Building vs. Compiling (Java)
Thinking that the answer to this is pretty obvious but here it goes:
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What is the difference between background and background-color
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edited Jan 27 '17 at 11:31
answered Jun 11 '14 at 19:15
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What is the difference between 127.0.0.1 and localhost
...you still have to do an actual lookup of localhost somewhere.
If you use 127.0.0.1, then (intelligent) software will just turn that directly into an IP address and use it. Some implementations of gethostbyname will detect the dotted format (and presumably the equivalent IPv6 format) and not do a lo...
Hashset vs Treeset
...hash algorithm that took 1 trillion machine instructions to execute (O(1)) vs any common implementation of bubble sort (O(N^2) avg/worst) for 10 elements. Bubble sort will win every time. The point is algorithms classes teach everyone to think about approximations using time-complexity but in the re...
Can't start Eclipse - Java was started but returned exit code=13
...nd prompt). On Windows 7 with 64-bit Java 6 I get:
java version "1.6.0_27"
Java(TM) SE Runtime Environment (build 1.6.0_27-b07)
Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06, mixed mode)
Note the 3rd line, which shows that this is a 64-bit version.
On a 32-bit version you'll get some...
System.BadImageFormatException: Could not load file or assembly [duplicate]
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REST APIs: custom HTTP headers vs URL parameters
When do you use custom HTTP headers in the request part of a REST API ?
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