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How and when to use ‘async’ and ‘await’
...he result of LongRunningOperationAsync can be done here
//and now we call await on the task
int result = await longRunningTask;
//use the result
Console.WriteLine(result);
}
public async Task<int> LongRunningOperationAsync() // assume we return an int from this long running...
java.sql.SQLException: - ORA-01000: maximum open cursors exceeded
...olution:
Increasing the number of cursors on the database (if resources allow) or
Decreasing the number of threads in the application.
Cursor leak
The applications is not closing ResultSets (in JDBC) or cursors (in stored procedures on the database)
Solution: Cursor leaks are bugs; increasin...
Maven - How to compile tests without running them ?
...without running them ? I want to use the IDE to run specific tests and not all of them.
7 Answers
...
OO Design in Rails: Where to put stuff
I'm really enjoying Rails (even though I'm generally RESTless), and I enjoy Ruby being very OO. Still, the tendency to make huge ActiveRecord subclasses and huge controllers is quite natural (even if you do use a controller per resource). If you were to create deeper object worlds, where would you p...
How to split strings across multiple lines in CMake?
I usually have a policy in my project, to never create lines in text files that exceed a line length of 80, so they are easily editable in all kinds of editors (you know the deal). But with CMake I get the problem that I do not know how to split a simple string into multiple lines to avoid one huge ...
How to create a cron job using Bash automatically without the interactive editor?
...w cron into cron file
echo "00 09 * * 1-5 echo hello" >> mycron
#install new cron file
crontab mycron
rm mycron
Cron line explaination
* * * * * "command to be executed"
- - - - -
| | | | |
| | | | ----- Day of week (0 - 7) (Sunday=0 or 7)
| | | ------- Month (1 - 12)
| | --------- Day of...
Undefined behavior and sequence points
...the C++ standard. The C++11 and C++14 versions of the standard do not formally contain 'sequence points'; operations are 'sequenced before' or 'unsequenced' or 'indeterminately sequenced' instead. The net effect is essentially the same, but the terminology is different.
Disclaimer : Okay. This ...
Java to Clojure rewrite
...ble state and develop pure (side-effect free) functions. You probably know all this already :-)
Anyway, this philosophy tends to lead towards something of a "bottom up" development style where you focus the initial efforts on building the right set of tools to solve your problem, then finally plug ...
Under what circumstances are linked lists useful?
...he new Thread Pool, (with the local "queues" implemented as stacks, essentially). (The other main supporting structure being ConcurrentQueue<T>.)
The new Thread Pool in turn provides the basis for the work scheduling of the new
Task Parallel Library.
So they can certainly be useful - a link...
SQL Server : Columns to Rows
...prior to applying the unpivot.
You could also use CROSS APPLY with UNION ALL to convert the columns:
select id, entityid,
indicatorname,
indicatorvalue
from yourtable
cross apply
(
select 'Indicator1', Indicator1 union all
select 'Indicator2', Indicator2 union all
select 'Indicator3', I...