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Does setting Java objects to null do anything anymore?
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It depends a bit on when you were thinking of nulling the reference.
If you have an object chain A->B->C, then once A is not reachable, A, B and C will all be eligible for garbage collection (assuming nothing else is r...
Android Studio marks R in red with error message “cannot resolve symbol R”, but build succeeds
...I've tried to create in Android Studio, all usages of R are marked in red with the error message "cannot resolve symbol R", but the compilation succeeds and the application runs. This is really annoying, as it blocks auto-completion and shows huge red waved lines all over my code.
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Django Server Error: port is already in use
...ype sudo fuser -k 8000/tcp.
This should kill all the processes associated with port 8000.
EDIT:
For osx users you can use sudo lsof -t -i tcp:8000 | xargs kill -9
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No mapping found for field in order to sort on in ElasticSearch
...uery if there are some documents found not containing field used in sort criteria.
8 Answers
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Sort ArrayList of custom Objects by property
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Since Date implements Comparable, it has a compareTo method just like String does.
So your custom Comparator could look like this:
public class CustomComparator implements Comparator<MyObject> {
@Override
public int compare(MyObject o1, MyObject...
How can I get all the request headers in Django?
...ad, Django simply dumps everything into the request.META variable along with a lot aof other data. What would be the best way to get all the headers that the client sent to my Django application?
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What's the difference between a mock & stub?
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Stub
I believe the biggest distinction is that a stub you have already written with predetermined behavior. So you would have a class that implements the dependency (abstract class or interface most likely) you are faking for testing purposes and the methods would just be stubbed out with set resp...
JavaScript: Is there a way to get Chrome to break on all errors?
...looking for an equivalent in Chrome to the "break on all errors" functionality of Firebug. In the Scripts tab, Chrome has a "pause on all exceptions", but this is not quite the same as breaking on all errors.
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string sanitizer for filename
I'm looking for a php function that will sanitize a string and make it ready to use for a filename. Anyone know of a handy one?
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I change the capitalization of a directory and Git doesn't seem to pick up on it
I'm developing a project on OS X Lion that is under Git version control. I had these lowercase directories and then later capitalized them (e.g. emailaddresses => EmailAddresses), but Git doesn't seem to recognize the change. It still thinks the directories are lowercase when I run git ls-files an...