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How do I create a unique constraint that also allows nulls?
...onal disk space.
Note that if you don't want an index, you can still save CPU by making the expression be precalculated to disk by adding the keyword PERSISTED to the end of the column expression definition.
In SQL Server 2008 and up, definitely use the filtered solution instead if you possibly ca...
Should I instantiate instance variables on declaration or in the constructor?
...ow it was him). Personal taste is personal taste; ultimately, neither the CPU nor the JRE care about syntactical style.
– Aquarelle
Sep 20 '13 at 22:38
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Calculate date from week number
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@RobinWassén-Andersson Good thing you revisited this question then :D 6 more votes and I'll tie with the "not" correct answer hehe.
– Mikael Svenson
May 27 '13 at 18:06
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Set environment variables from file of key/value pairs
...nvironment variables and executes the command.
– André Herculano
Jun 25 '16 at 16:46
5
I've had ...
How do I detect if software keyboard is visible on Android Device or not?
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Yeah, it always return true.
– Léon Pelletier
Mar 25 '14 at 20:45
187
It is...
How do I automatically update a timestamp in PostgreSQL
... Says so in the Postgres documentation of the types. Varchar has extra CPU cycles to check for the constraint, which doesn't happen on TEXT.
– Rahly
Jun 21 '17 at 15:50
3
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Dealing with “java.lang.OutOfMemoryError: PermGen space” error
...ust too many classes/static data in your web app.
– Péter Török
Dec 14 '11 at 8:50
got the same issue as HDave when...
How to pass command line arguments to a shell alias? [duplicate]
... blah(){ echo "First: $1"; echo "Second: $2"; }
– René Nyffenegger
Apr 24 '16 at 13:38
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How to destroy an object?
...for "speed", but if you want to reclaim memory immediately (at the cost of CPU) should want to use null.
Like others mentioned, setting to null doesn't mean everything is reclaimed, you can have shared memory (uncloned) objects that will prevent destruction of the object. Moreover, like others h...
python-pandas and databases like mysql
...e: dialect+driver://user:pwd@host:port/db
– Nuno André
Sep 15 '19 at 20:03
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