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What is a callback function?
...method is called (whatever condition, such as a button click, a timer tick etc) and its method body completes, the callback function is then invoked.
Some languages support constructs where multiple callback function arguments are supported, and are called based on how the parent function completes...
Does setting Java objects to null do anything anymore?
...u should generally always be thinking of removing objects from lists, maps etc by calling the appropiate remove() method.
The case where there used to be some advice to set references to null was specifically in a long scope where a memory-intensive object ceased to be used partway through the scop...
Using the field of an object as a generic Dictionary key
...ion detail, Int32.GetHashCode() is "return this;". For other types (string etc), then yes: .GetHashCode() would be very useful.
– Marc Gravell♦
Mar 11 '09 at 15:51
2
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What are some examples of commonly used practices for naming git branches? [closed]
...hes or dots. But slashes let you do some branch renaming when pushing or fetching to/from a remote.
$ git push origin 'refs/heads/feature/*:refs/heads/phord/feat/*'
$ git push origin 'refs/heads/bug/*:refs/heads/review/bugfix/*'
For me, slashes also work better for tab expansion (command complet...
SET versus SELECT when assigning variables?
...
Aside from the one being ANSI and speed etc., there is a very important difference that always matters to me; more than ANSI and speed. The number of bugs I have fixed due to this important overlook is large. I look for this during code reviews all the time.
-- Ar...
Can we define implicit conversions of enums in c#?
...ding methods to return the value of DescriptionAttributes, declared names, etc, etc.
I wrote a base class (RichEnum<>) to handle most fo the grunt work, which eases the above declaration of enums down to:
public sealed class AccountStatus : RichEnum<byte, AccountStatus>
{
public st...
Passing arrays as parameters in bash
...d when given as parameters.
Note that this still works even with descTable etc being defined with local, because locals are visible to the functions they call.
The ! in ${!1} expands the arg 1 variable.
declare -a just makes the indexed array explicit, it is not strictly necessary.
...
Is there a naming convention for MySQL?
...ls consisting of two names (DocumentChapter, DocumentVersion, DocumentType etc.). For example for DocumentType i could name it documenttype or document_type. I would prefer the latter one, but most of the time i have a many to many relationship and i need a table looking like document_document_type....
Why would one omit the close tag?
...ickle of the common headers already sent causes (raw output, BOM, notices, etc.) and their follow-up problems.
PHP actually contains some magic to eat up single linebreaks after the ?> closing token. Albeit that has historic issues, and leaves newcomers still susceptible to flaky editors and una...
Running a Haskell program on the Android OS
... small inf style file which describes the platform (word size, c-compiler, etc) I've done this with the Wii homebrew dev kit and it was quite easy. However jhc still has some stability issues with complex code such as using a monad transformer stack with IO but jhc has been improving a lot over the ...