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What do the makefile symbols $@ and $< mean?
...$@ is the name of the target being generated, and $< the first prerequisite (usually a source file). You can find a list of all these special variables in the GNU Make manual.
For example, consider the following declaration:
all: library.cpp main.cpp
In this case:
$@ evaluates to all
$< eval...
Git - How to fix “corrupted” interactive rebase?
I managed to create a little mess in my local git repository. I was trying to fix a broken commit by using the following instructions . Before running the "git commit --amend" (and after the git rebase --interactive) I decided that my changes were incorrect and so I executed "git reset HEAD --hard"...
How to use sed/grep to extract text between two words?
...0 That would work if you want to see the "Here is a" as well. You can test it out: echo "Here is a one is a String" | sed -e 's/one is\(.*\)String/\1/'. If you just want the part between "one is" and "String", then you need to make the regex match the whole line: sed -e 's/.*one is\(.*\)String.*/\1/...
Detect changes in the DOM
...ontrol over the changes you just need to create your own domChanged API - with a function or custom event - and trigger/call it everywhere you modify things.
The DOM Level-2 has Mutation event types, but older version of IE don't support it. Note that the mutation events are deprecated in the DOM3...
Does uninstalling a package with “pip” also remove the dependent packages?
...p to install a package, all the required packages will also be installed with it (dependencies). Does uninstalling that package also remove the dependent packages?
...
Properly removing an Integer from a List
Here's a nice pitfall I just encountered.
Consider a list of integers:
8 Answers
8
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rake db:schema:load vs. migrations
... be made to the database during deploys: migrations provide this functionality with a rollback failsafe. If you run rake db:schema:load on a production server, you'll end up deleting all your production data. This is a dangerous habit to get into.
That being said, I believe it is a decent practice ...
Difference of Maven JAXB plugins
I have determined that two JAXB plugins for Maven 2 exist, with some different configurations.
6 Answers
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In a Bash script, how can I exit the entire script if a certain condition occurs?
I'm writing a script in Bash to test some code. However, it seems silly to run the tests if compiling the code fails in the first place, in which case I'll just abort the tests.
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Why is there a difference in checking null against a value in VB.NET and C#?
...don't know yet". is naturally "I don't know yet"; ie NULL. This has the additional advantage of mirroring the behaviour of NULL in (most if not all) SQL databases. This is also a more standard (than C#'s) interpretation of three-valued logic, as explained here.
The C# team made different assumption...