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Common elements in two lists
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Use Collection#retainAll().
listA.retainAll(listB);
// listA now contains only the elements which are also contained in listB.
If you want to avoid that changes are being affected in listA, then you need to create a new one.
List<Integer> common = new ArrayList<Integer>(...
A html space is showing as %2520 instead of %20
...inks. Assuming you want to link to the resource C:\my path\my file.html:
if you provide a local file path only, the browser is expected to encode and protect all characters given (in the above, you should give it with spaces as shown, since % is a valid filename character and as such it will be en...
Can a class member function template be virtual?
... just indirection, and there is no "runtime figuring out" involved, it is known during compile time that the function to be called is the one pointed to by the n-th pointer in the vtable. "Figuring out" implies there are type checks and such, which is not the case. Once the run-time system figured o...
Generate a random date between two other dates
...ime.date(2025, 3, 12)
fake.date_time_between(start_date='-30y', end_date='now')
# datetime.datetime(2007, 2, 28, 11, 28, 16)
# Or if you need a more specific date boundaries, provide the start
# and end dates explicitly.
import datetime
start_date = datetime.date(year=2015, month=1, day=1)
fake.d...
Find a Pull Request on Github where a commit was originally created
...ues" link on the left.
UPDATED 13 July 2017
Via the Github UI there is a now a really easy way to do this. If you are looking at a commit in the list of commits in a branch in the UI, click on the link to the commit itself. If there is a PR for that commit and it wasn't added directly to the branc...
What is the precise meaning of “ours” and “theirs” in git?
...asic of a question, but I have searched for answers and I am more confused now than before.
7 Answers
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Why do people still use primitive types in Java?
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Now imagine if i were declared as Long as well!
– ColinD
Mar 4 '11 at 21:39
14
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javascript: recursive anonymous function?
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(function foo() { foo(); })();
is a stack-blowing recursive function. Now, that said, you probably don't may not want to do this in general because there are some weird problems with various implementations of Javascript. (note — that's a fairly old comment; some/many/all of the problems desc...
What is the use of ObservableCollection in .net?
...ed,
INotifyPropertyChanged
As such it is very useful when you want to know when the collection has changed. An event is triggered that will tell the user what entries have been added/removed or moved.
More importantly they are very useful when using databinding on a form.
...
Is Java really slow?
... use standard libraries).
There is no excuse for "slow" Java applications now. Developers and legacy code/libraries are to blame, far more than the language. Also, blame anything 'enterprise.'
In fairness to the "Java is slow" crowd, here are areas where it is still slow (updated for 2013):
Libr...