The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for November 21st, 2018

Delphi sorcery: Loop wars – measuring performance

Posted by jpluimers on 2018/11/21

Interesting read: [WayBack] Delphi sorcery: Loop wars – measuring performance.

It is on optimisation of for…in constructs. More comments at [WayBack] Since there was this offtopic argument going on about performance of for-in versus for-to. – Stefan Glienke – Google+, including penalties for TStrings, string handling and inline methods.

–jeroen

Posted in Delphi, Development, Software Development | Leave a Comment »

Watch “Modifying an old light with LED tape.” on YouTube

Posted by jpluimers on 2018/11/21

Posted in Uncategorized | Leave a Comment »

In operations, code is not your friend. Make things simple, make them boring …

Posted by jpluimers on 2018/11/21

Painful lesson learned a while ago: In operations, code is not your friend. Make things simple, make them boring and make them obvious, and keep an eye on the configuration complexity cloc… – Kristian Köhntopp – Google+

Read the rest of this entry »

Posted in Cloud, Development, DevOps, Infrastructure, Software Development | Leave a Comment »

Date and time conversion is hard in databases: `conversion error from string “30-12-1899″`

Posted by jpluimers on 2018/11/21

Converting string literals to to date/time/timestamp related data is always tricky in many Database environments.

Firebird is no exception, especially because sometimes it truncates a zero time portion from a date-time/timestamp.

So you can get this:

select cast('30-12-1899' as TimeStamp)
from rdb$database

Throwing an error:

conversion error from string "30-12-1899"

And this:

select cast('30.12.1899' as TimeStamp)
from rdb$database

Returning

CAST
30-12-1899 0:00:00

–jeroen

Posted in Database Development, Development, Firebird, Software Development | Leave a Comment »

 
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