Posted by jpluimers on 2018/07/11
[WayBack] QualityCentral 110308 – TDBEdit updates wrongly Datalink.Modified when Dataset being in Browse mode and [WayBack] QualityCentral 127300 – Closed Exception When Ctrl+A (select text) on TDBEdit have been partially fixed in Delphi 10.2 Tokyo under [RSP-16288] Bug after selecting all the text by pressing Ctrl+A in TDBEdit and pressing TAB – Embarcadero Technologies.
Since there is only manual syncing from Quality Portal to Quality Central, and only Quality Central is indexed by search engines, the public at large usually finds the Quality Central bugs.
Basically, the affected controls ([WayBack] TDBEdit, [WayBack] TDBComboBox, [WayBack] TDBMemo, but not [WayBack] TDBRichEdit – probably not needed as I could not reproduce the [WayBack] TClientDataSet based QC127300 attachment in Delphi 10.1 with TDBMemo or TDBRichEdit, though neither selected of these two all text, which 10.2 also fixes).
the .KeyPress methods now check for a Ctrl-A case like this:
^A:
begin
SelectAll;
Key := #0;
end;
and some of the .KeyDown methods have been tuned a little by setting Key := 0 when Edit returns false.
–jeroen
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Posted by jpluimers on 2018/07/11
When accessing the VCL from multiple threads at the same time: adopted from …\DEMOS\THREADS\THRDDEMO.DPR
Great question a while ago:
[WayBack] “Don’t access VCL from a background thread” – how to demo that? – Primož Gabrijelčič – Google+
For me, the ultimate way why not to access the VCL from a background thread is the precursor of the official threads demo that ships from Delphi 2 to Delphi XE6 in ...DEMOS\THREADS\THRDDEMO.DPR. where you’d think the thread isolation would be in ...DEMOS\THREADS\ThSort.pas but actually is in ...DEMOS\THREADS\SortThds.pas.
The first public showing of that demo did not include main thread protection. It originates from a session at the the 1995 Borland Developers Conference where Ray Konopka showed the below code from Bob Ainsbury.
That session reminded why this joke [WayBack] Via the EKON20 sessions… – Jeroen Wiert Pluimers – Google+ was so funny: “When Ray Konopka enters the room you have a Raize condition.“.
The question above also made me find back this reference to BorCon95 in San Diego:
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Posted in Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi 10.2 Tokyo (Godzilla), Delphi 2, Delphi 2005, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Delphi 7, Delphi 8, Delphi x64, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development | 2 Comments »
Posted by jpluimers on 2018/07/10
This small query gives you the tables, views and columns having characters likely not translating directly to ORM identifiers because they contain other characters than a-zA-Z0-9:
select *
from INFORMATION_SCHEMA.COLUMNS c
where 1=0
or c.TABLE_NAME LIKE '%[^a-zA-Z0-9_]%'
or c.COLUMN_NAME LIKE '%[^a-zA-Z0-9_]%'
The view [WayBack] COLUMNS (Transact-SQL) | Microsoft Docs in the … has been around since at least SQL Server 2000, so this is a pretty safe method for finding those columns.
As a bonus, I learned that SQL Server supports a subset of regular expression matches in like also since at least SQL Server 2000: LIKE.
Via [WayBack] SQL Server 2008 query to find rows containing non-alphanumeric characters in a column – Stack Overflow.
Related:
–jeroen
Posted in Database Development, Development, SQL Server | Leave a Comment »
Posted by jpluimers on 2018/07/09
Everytime a btrfs based volume runs out of space, I’m reminded of these:
There are a few scripts that help you assess quota usage. If you think they are wrong, then you need to btrfs quota rescan / which tells you that it started, but won’t tell when it’s finished (nor wil journalctl -xe a.k.a. journalctl --catalog --pager-end), but dmesg does:
# dmesg | grep qgroup
[ 316.608122] BTRFS info (device sda2): qgroup scan completed (inconsistency flag cleared)
For now I’ve this quick script to start investigation:
~/Versioned/btrfs-du/btrfs-du && df -h | grep "\/$\|^[^\/]" && btrfs quota rescan -s /
It assumes there is quota on the root (enable with btrfs quota enable /) and is based on my fork github.com/jpluimers/btrfs-du. The df will limit itself to the root (trailing / matched by \/$) or disks not mounted from / (matched by ^[^\/]).
–jeroen
References (not solutions):
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Posted in *nix, btrfs, File-Systems, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2018/07/09
A few years ago, Google Drive introduced this:
For those looking to share files more quickly, listen up. You can now share with others directly from the Google Drive folder on your Mac or PC. To share a file while inside your Google Drive folder, simply right click the file, select “Google Drive” and then click “Share.” This new feature is rolling out over the next few days.
Source: [WayBack] Save time with right-click sharing from your Google Drive folder…
However, sometimes it fails. And the menu has changed as well.
By now the menu looks like this:
- “View with Google Drive”
- “Share using Google Drive”
If those do not appear, then:
Try to stop, then start Google Drive.
If that fails:
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Posted in Google, GoogleDrive, LifeHacker, Power User | Leave a Comment »
Posted by jpluimers on 2018/07/08
Via [WayBack] Artikel 13 (Uploadfilter) vs. Math – Math wins – Kristian Köhntopp – Google+:
Simulation of the proposed law effects are easy: [WayBack] Thread by @AlecMuffett: “Regards Article13, I wrote up a little command-line false-positive emulator; it tests 10 million events with a test (for copyrighted material) […]” #Article13
What it shows that an automated test for content-originality only succeeds when there are a truckload of copyrighted-material uploads than original-content uploads:
about 1 in 67 postings have to be “bad” in order to break even
So if you have less than 1% false uploads, even with a 98.5% accuracy (which is very very good for a take-down algorithm!), you will piss off far more good items wrongly marked as false positive, than bad items correctly marked bad.
When the accuracy gets less, you piss-off far more original-content uploads, but also catch less copyrighted-material uploads..
This is called the a far less “sexy” term False positive paradox – Wikipedia, which is a specialisation of the far mor dull sounding Base rate fallacy – Wikipedia
Source code: [WayBack] random-code-samples/falsepos.py at master · alecmuffett/random-code-samples · GitHub
Original thread:
[WayBack] Alec Muffett on Twitterさん: “Regards #Article13, I wrote up a little command-line false-positive emulator; it tests 10 million events with a test (for copyrighted material, abusive material, whatever) that is 99.5% accurate, with a rate of 1-in-10,000 items actually being bad.… https://t.co/CJvxdvkiom”
https://twitter.com/alecmuffett/status/1015594170424193024
and
[WayBack] next_ghost on Twitter: “And for the nerds who want to learn more, this is called a “False positive paradox”. https://t.co/CIvw2ni21q… “
–jeroen
Posted in Algorithms, Development, Software Development | 1 Comment »
The Wiert Corner - irregular stream of stuff 