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PG::ConnectionBad - could not connect to server: Connection refused
...ecause your computer didn't complete the shutdown process completely which means postgres didn't delete the PID (process id) file.
The PID file is used by postgres to make sure only one instance of the server is running at a time. So when it goes to start again, it fails because there is already a...
Difference between / and /* in servlet mapping url pattern
...on property called alwaysUseFullPath which defaults to false.
false here means Spring will not use the full path to mapp a url to a controller. What does it mean? It means when you define a servlet-mapping:
<servlet-mapping>
<servlet-name>viewServlet</servlet-name>
<u...
What is Ad Hoc Query?
...an you explain what you're writing more? What is the "typical set"; do you mean compiled code?
– Ben
Dec 25 '13 at 9:58
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What is the purpose of the -nodes argument in openssl?
...glish word "nodes", but rather is "no DES". When given as an argument, it means OpenSSL will not encrypt the private key in a PKCS#12 file.
To encrypt the private key, you can omit -nodes and your key will be encrypted with 3DES-CBC. To encrypt the key, OpenSSL prompts you for a password and it u...
Gradle, “sourceCompatibility” vs “targetCompatibility”?
... because you use sourceCompability (or targetCompatibility) of 1.5 doesn't mean you can always compile your code with JDK 1.6 and expect it to work under JDK 1.5. The issue is the available libraries.
If your code happens to call some method that is only available in JDK 1.6 it will still compile w...
What is an SDL renderer?
...ant to note that 0, 0 is the upper-left corner in SDL. So a higher y-value means lower, and the bottom-right corner will have the coordinate x + w, y + h
You can read more about SDL2 on my blog.
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Debug code-first Entity Framework migration codes
...of CreateDbContext it seems to somehow both attach, and not attach. What I mean is, it attaches and starts trying to step into .asm files and .cpp files (internal code). If I try to set a breakpoint on a Console.Writeline that I KNOW gets executed afterwards (I can see the output from ANY "dotnet ef...
How to fix org.hibernate.LazyInitializationException - could not initialize proxy - no Session
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Can you explain its meaning as well?
– Mohit Kanwar
Jul 13 '15 at 11:26
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Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
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eeehm i'm not sure wether I understand what you mean: 'file was half the size of ...? PNG file like icon.png? or do you mean the base64 equivalent of it is smaller when its png formatted in stead of icon formatted or gif? curious. Cheers mate!
– Sam
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How do I convert a string to enum in TypeScript?
...itly has 'any' type because index expression is not of type 'number'.
It means that by default the TypeScript Enum type works with number indexes, i.e.
let c = Color[0], but not with string indexes like let c = Color["string"]. This is a known restriction by the Microsoft team for the more general...