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What are '$$' used for in PL/pgSQL
...is +999 999'';
END IF;
RETURN true;
END
' LANGUAGE plpgsql STRICT IMMUTABLE;
This isn't such a good idea. Use dollar-quoting instead, more specifically also put a token between the $$ to make it unique - you might want to use $-quotes inside the function body, too. I do that a lot, actually.
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creating a random number using MYSQL
...andom number to be repeated then you will have to somewhat store in a temp table. So you can check it against with where randnum not in (select * from temptable)...
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How to drop a PostgreSQL database if there are active connections to it?
...ns after they've finished with their current transaction and then drop the table(s) in question?
– paulkon
Apr 25 '15 at 17:07
5
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Singular or plural controller and helper names in Rails
...ects of the application, gathering information from more than one database table. So here, Dashboard does not refer to any model of the application, and it would be just weird to have the controller's name be DashboardsController.
I found a good solution to the irritation of automatic pluralizatio...
Passing argument to alias in bash [duplicate]
...and definition (for each defined alias, keyword, function, builtin or executable file):
type -a foo
Or type only (for the highest precedence occurrence):
type -t foo
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Python's json module, converts int dictionary keys to strings
...e.
In Python (and apparently in Lua) the keys to a mapping (dictionary or table, respectively) are object references. In Python they must be immutable types, or they must be objects which implement a __hash__ method. (The Lua docs suggest that it automatically uses the object's ID as a hash/key ...
How can I do string interpolation in JavaScript?
...ring literal? For example, if one had a json file containing a translation table that needed values interpolated into them for display purposes? I think the first solution probably works well for this situation, but I do like the new string template syntax in general.
– nbering...
Nullable types and the ternary operator: why is `? 10 : null` forbidden? [duplicate]
...class or interface of System.Int32. As an example GetBoolValue() ? (IFormattable)10 : null // #1B or GetBoolValue() ? 10 : (IFormattable)null // #2B will be OK. This possibility may be a reason why they don't make the nullable-wrapping automatic. Because both wrapping and boxing are normally implici...
Is there XNOR (Logical biconditional) operator in C#?
I'm new to C# and could not find XNOR operator to provide this truth table:
4 Answers
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Reliable method to get machine's MAC address in C#
...d be many active connections on a machine and their order may not be predictable.
– Dave R.
Mar 9 '11 at 15:33
@DaveR....