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How to find gaps in sequential numbering in mysql?
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the only problem with this, is that it doesn't "report" a possible initial gap. e.g. if the first 5 ids are missing (1 through 5) it doesn't show that... How could we show pissible gaps at the very begining?
– DiegoDD
Apr 12 ...
H2 in-memory database. Table not found
...have to configure the url like this
jdbc:h2:mem:test;DB_CLOSE_DELAY=-1
If doing so, h2 will keep its content as long as the vm lives.
Notice the semicolon (;) rather than colon (:).
See the In-Memory Databases section of the Features page. To quote:
By default, closing the last connection to a dat...
$_POST vs. $_SERVER['REQUEST_METHOD'] == 'POST'
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Well, they don't do the same thing, really.
$_SERVER['REQUEST_METHOD'] contains the request method (surprise).
$_POST contains any post data.
It's possible for a POST request to contain no POST data.
I check the request method — I...
How to import classes defined in __init__.py
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I don't understand why that's circular. If settings.py needs Helper and say foo.someobject.py needs Helper, where do you suggest I define it?
– scottm
Feb 24 '09 at 19:50
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Hibernate, @SequenceGenerator and allocationSize
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To be absolutely clear... what you describe does not conflict with the spec in any way. The spec talks about the values Hibernate assigns to your entities, not the values actually stored in the database sequence.
However, there is the option to get the behavior you a...
onSaveInstanceState () and onRestoreInstanceState ()
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If I understand correctly, this is what you are doing: From B you call startActivity(A). Then from A you call finish() to get back to B. Right? In that case Your first activity, B will not have been destroyed, and neither onCreate() nor onRestoreInstanceState() will be cal...
Set icon for Android application
...lect launcher icon → choose image file.
It will automatically re-size.
Done!
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“Unknown class in Interface Builder file” error at runtime
...terface Builder file." error printed at runtime, this issue has nothing to do with Interface Builder, but rather with the linker, which is not linking a class because no code uses it directly.
When the .nib data (compiled from the .xib) is loaded at runtime, MyClass is referenced using a string, bu...
Deprecated warning for Rails 4 has_many with order
... works superb! where can I find such information in the guides or docs? I can't find one. thanks.
– shankardevy
Aug 17 '13 at 2:59
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Why is std::map implemented as a red-black tree?
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you make it sound like red-black trees can do tree modifications in O(1) time, which is not true. tree modifications are O(log n) for both red-black and AVL trees. that makes it moot whether the balancing part of the tree modification is O(1) or O(log n) because the...