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How do you use variables in a simple PostgreSQL script?
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Took me a while to figure out that in order to use the variable you must not prefix it with a : as with other variables. @achilles-ram-nakirekanti you could add an example using this in a select statement to make this clearer?
– exhuma
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RabbitMQ / AMQP: single queue, multiple consumers for same message?
...ueue is a given, and not configurable. Ie, separate queues are required in order to have the same message ID be handled by multiple consumers.
Is this commonly done? Should I just have the exchange route the message into two separate queues, with a single consumer, instead?
No it's not, single que...
How to keep index when using pandas merge
...as before:
a.merge(b, how="left").set_axis(a.index)
merge preserves the order at dataframe 'a', but just resets the index so it's save to use set_axis
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Batch file include external file for variables
...subjects (family, size, color, animals) and apply them individually in any order anywhere you want in your batch scripts:
@echo off
rem Empty the variable to be ready for label config_all
set config_all_selected=
rem Go to the label with the parameter you selected
goto :config_%1
REM This next li...
How do you run a single test/spec file in RSpec?
...ou're using Rails you'll probably want to execute your specs using Rake in order to ensure you are starting from a blank database.
– superluminary
Oct 2 '13 at 11:54
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View contents of database file in Android Studio
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Because you need to install in in order to use
– Paul Paca-Vaca Seleznev
Jun 19 '15 at 14:57
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How can I pass a member function where a free function is expected?
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A pointer to member function is different from a pointer to function. In order to use a member function through a pointer you need a pointer to it (obviously ) and an object to apply it to. So the appropriate version of function1 would be
void function1(void (aClass::*function)(int, int), aClass&...
How can I use goto in Javascript?
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Absolutely! There is a project called Summer of Goto that allows you use JavaScript at its fullest potential and will revolutionize the way you can write your code.
This JavaScript preprocessing tool allows you to create a label and then goto it using this ...
What is the difference between JavaConverters and JavaConversions in Scala?
... will be implicitly added to the collection that you want to transform. In order to use these converters, you need to import :
import collection.JavaConverters._
You should prefer JavaConversions as it's generally easier to use (no need to use asScala or asJava).
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Calculate a Running Total in SQL Server
...ou to do things like:
SELECT somedate, somevalue,
SUM(somevalue) OVER(ORDER BY somedate
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
AS RunningTotal
FROM Table
SQL Server gives you no clean solution to this problem. My gut is telling me that this is one of those rare c...