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How to find the size of an array in postgresql
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cardinality returns the number of all the elements in a single or multidimensional array. So select cardinality(ARRAY[[1,2], [3,4]]); would return 4, whereas select array_length(ARRAY[[1,2], [3,4]], 1) would return 2. If you're counting the first dimension, a...
How to quit scala 2.11.0 REPL?
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I ran into the same issue on upgrade, just use colon q.
:q
Additionally, exit was deprecated in 2.10.x with sys.exit suggested instead, so this works as well:
sys.exit
As a side note, I think they did this so you can distinguish between exiting the scala console in sbt and exiting sbt its...
git rebase without changing commit timestamps
...branch", using the option --committer-date-is-author-date (introduced initially in Jan. 2009 in commit 3f01ad6
Note that the --committer-date-is-author-date option seems to leave the author timestamp, and set the committer timestamp to be the same as the original author timestamp, which is what the...
android fragment onRestoreInstanceState
... that fragment (which belongs to an activity) and go back to the fragment, all values are then restored from the parent activity
– Shaun
Dec 5 '13 at 3:16
3
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PowerMockito mock single static method and return object
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What you want to do is a combination of part of 1 and all of 2.
You need to use the PowerMockito.mockStatic to enable static mocking for all static methods of a class. This means make it possible to stub them using the when-thenReturn syntax.
But the 2-argument overload of mo...
SQL standard to escape column names?
...ody> <double quote>
Oracle, PostgreSQL, MySQL, MSSQL and SQlite all support " as the identifier delimiter.
They don't all use " as the 'default'. For example, you have to be running MySQL in ANSI mode and SQL Server only supports it when QUOTED_IDENTIFIER is ON.
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How does one escape backslashes and forward slashes in VIM find/search?
...erent delimiter instead:
:%s@<doc/>@<cat\\>@
This saves you all typing all those time-consuming, confusing backslashes in patterns with a ton of slashes.
From the documentation:
Instead of the / which surrounds the pattern and replacement string, you
can use any other single-b...
How to get mouse position in jQuery without mouse-events?
... if (currentMousePos.x < 10) {
// ....
}
});
But almost all code, other than setTimeout code and such, runs in response to an event, and most events provide the mouse position. So your code that needs to know where the mouse is probably already has access to that information...
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Calling class staticmethod within the class body?
... def stat_func():
return 42
_ANS = stat_func.__func__() # call the staticmethod
def method(self):
ret = Klass.stat_func()
return ret
As an aside, though I suspected that a staticmethod object had some sort of attribute storing the original function, I had no ...
Change size of axes title and labels in ggplot2
I have a really simple question, which I am struggling to find the answer to. I hoped someone here might be able to help me.
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