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What is SuppressWarnings (“unchecked”) in Java?
...t<User> findAllUsers(){
Query query = entitymanager.createQuery("SELECT u FROM User u");
return (List<User>)query.getResultList();
}
If I didn'n anotate the @SuppressWarnings("unchecked") here, it would have a problem with line, where I want to return my ResultList.
In shortcu...
Swift class introspection & generics
...requires an '@required' initializer
Y().me()
^
<REPL>:3:7: note: selected implicit initializer with type '()'
class X {
^
It took me a while to figure out what this means… turns out it wants the class to have a @required init()
class X {
func me() {
println("asdf"...
How to turn on line numbers in IDLE?
...Numbers entry on the Options menu. There is currently no hotkey. One can select a line or bloc of lines by clicking on a line or clicking and dragging.
Some people may have missed Edit / Go to Line. The right-click context menu Goto File/Line works on grep (Find in Files) output as well as on tr...
Rails: How to change the title of a page?
...In rails 3 content_for is smart enough to work correctly with caching (see selected answer).
– opsb
Nov 15 '11 at 10:41
4
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PostgreSQL - Rename database
...res
-- force disconnect all other clients from the database to be renamed
SELECT pg_terminate_backend( pid )
FROM pg_stat_activity
WHERE pid <> pg_backend_pid( )
AND datname = 'name of database';
-- rename the database (it should now have zero clients)
ALTER DATABASE "name of database" R...
Android: Tabs at the BOTTOM
...
You should select this (or something) as the accepted answer.
– JediPotPie
Dec 14 '10 at 17:09
4
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How can I determine if a date is between two dates in Java? [duplicate]
...
Is this better than the "selected solved answer"?
– Christian Moen
Jan 21 '17 at 23:01
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s...
Is it possible to install APK file if more than one emulators/devices are connected [duplicate]
... (on left) -->Target --> Launch on All compatible devices.
The selected project will be installed on all the connected devices
share
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improve this answer
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follo...
Why is it important to override GetHashCode when Equals method is overridden?
...yeah, looks like I left them out when I copy-pasted the code from a region selection in Visual Studio. I also thought people would figure it out both.
– Trap
Apr 13 '12 at 12:11
3
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How do I dump an object's fields to the console?
...", "reverse", "reverse!", "rindex", "rjust", "rstrip", "rstrip!", "scan", "select", "send", "singleton_methods", "size", "slice", "slice!", "sort", "sort_by", "split", "squeeze", "squeeze!", "strip", "strip!", "sub", "sub!", "succ", "succ!", "sum", "swapcase", "swapcase!", "taguri", "taguri=", "tain...