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Understanding Apache's access log
... reliable)
%u is the user name determined by HTTP authentication
%t is the time the request was received.
%r is the request line from the client. ("GET / HTTP/1.0")
%>s is the status code sent from the server to the client (200, 404 etc.)
%b is the size of the response to the client (in bytes)
Re...
How to “pretty” format JSON output in Ruby on Rails
...ommend to use it in production.rb. The JSON reparsing may degrade response time and throughput of your production app. Eventually extra logic such as 'X-Pretty-Json: true' header may be introduced to trigger formatting for manual curl requests on demand.
(Tested with Rails 3.2.8-5.0.0, Ruby 1.9.3-2...
Why is it not possible to extend annotations in Java?
...se: @Target(ElementType.ANNOTATION_TYPE) @Retention(RetentionPolicy.RUNTIME) @interface C {}; @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) @C public @interface F {} class a{ @F public void S() {} } @Test public void blahTes...
What do linkers do?
...mpiler converts the source file into object byte code. This byte code (sometimes called object code) is mnemonic instructions that only your computer architecture understands. Traditionally, these files have an .OBJ extension.
After the object file is created, the linker comes into play. More ofte...
When is SQLiteOpenHelper onCreate() / onUpgrade() run?
...le so that onCreate() is run again. This is often preferred at development time where you have control over the installed versions and data loss is not an issue. Some ways to delete the database file:
Uninstall the application. Use the application manager or adb uninstall your.package.name from th...
The performance impact of using instanceof in Java
...th wrote, "We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil." The performance of instanceof probably won't be an issue, so don't waste your time coming up with exotic workarounds until you're sure that's the problem.
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What is “overhead”?
...e worth it if you were going across the country.
In computer science, sometimes we use cars to go down the street because we don't have a better way, or it's not worth our time to "learn how to walk".
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Unit testing Anti-patterns catalogue
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Yeah, that's my favorite one. I do it all the time. Oh... wait... you said that this was a bad thing. :-)
– guidoism
Sep 10 '10 at 22:37
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How to convert AAR to JAR
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I had a hard time finding out how to extract it on mac, in case others too: just change .aar to .zip and double click!
– Bastien Beurier
Jan 29 '15 at 23:16
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Using curl POST with variables defined in bash script functions
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Thanks a lot @pbaranski you saved lot of my time
– sudhir tataraju
Oct 17 '19 at 14:08
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