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Fast way to discover the row count of a table in PostgreSQL
...IN pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname = 'mytable'
AND n.nspname = 'myschema'
Or better still
SELECT reltuples::bigint AS estimate
FROM pg_class
WHERE oid = 'myschema.mytable'::regclass;
Faster, simpler, safer, more elegant. See the manual on Object Identifier Type...
Maven does not find JUnit tests to run
... I never knew this - had two cases that ended with "Tests", and maven refused to run them...changed to "Test", and all is well in the lollipop guild again. Thanks.
– demaniak
May 5 '14 at 10:24
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Viewing complete strings while debugging in Eclipse
While debugging Java code, Strings in the views "Variables" and "Expressions" show up only till a certain length, after which Eclipse shows "..."
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Using a dictionary to count the items in a list [duplicate]
I'm new to Python and I have a simple question, say I have a list of items:
8 Answers
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Why do loggers recommend using a logger per class?
...u still do this, but you can do it once per class instead of once per call and eliminate a serious performance problem.
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How to force NSLocalizedString to use a specific language
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NSLocalizedString() (and variants thereof) access the "AppleLanguages" key in NSUserDefaults to determine what the user's settings for preferred languages are. This returns an array of language codes, with the first one being the one set by the ...
filter for complete cases in data.frame using dplyr (case-wise deletion)
...works, of course. But that is a) verbose when there are a lot of variables and b) impossible when the variable names are not known (e.g. in a function that processes any data.frame).
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What is a daemon thread in Java?
...ng" while @sateesh says that "JVM halts any remaining daemon threads are abandoned". So do daemon threads finish running when JVM exits?
– Gerald
Oct 16 '15 at 3:09
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How do I switch between the header and implementation file in Xcode 4?
How do I switch between the header and implementation file in Xcode 4?
7 Answers
7
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How to check if a user is logged in (how to properly use user.is_authenticated)?
...ng. I need to check if the current site user is logged in (authenticated), and am trying:
6 Answers
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