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How can I append a string to an existing field in MySQL?
... Alternatively you can use CONCAT_WS which skips NULL values. For example SELECT CONCAT_WS(', ','First name',NULL,'Last Name'); gives 'First name, Last Name'
– BarneySchmale
Aug 8 '16 at 11:00
...
Updating MySQL primary key
...e, user_interactions u write, user_interactions write;
insert into fixit
select user_2, user_1, type, max(timestamp), count(*) n from user_interactions u
group by user_2, user_1, type
having n > 1;
delete u from user_interactions u, fixit
where fixit.user_2 = u.user_2
and fixit.user_1 = u...
Python argparse: Make at least one argument required
...tiple aspects of command line based program:
good design of command line
selecting/using proper parser
argparse offers a lot, but restricts possible scenarios and can become very complex.
With docopt things go much shorter while preserving readability and offering high degree of flexibility. If...
How do I merge changes to a single file, rather than merging commits?
...to merge only 2 from B to A. Regular merge would merge all 4, here you can select. This may look as they were overridden because B contains essentially newer files. You need to support your experience with some evidence.
– Pawel Cioch
Nov 12 '19 at 19:27
...
How to convert IPython notebooks to PDF and HTML?
...eps.
For HTML output, you should now use Jupyter in place of IPython and select File -> Download as -> HTML (.html) or run the following command:
jupyter nbconvert --to html notebook.ipynb
This will convert the Jupyter document file notebook.ipynb into the html output format.
Google C...
How to find elements with 'value=x'?
...ifferent values are located into #attached_docs , but I don't know how to select element with value="123" .
5 Answers
...
Pure CSS to make font-size responsive based on dynamic amount of characters
...ntSize = "70%";
}
}
For me, I call this function when a user makes a selection in a drop-down, and then a div in my menu gets populated (this is where I have dynamic text occurring).
scaleFontSize("my_container_div");
In addition, I also use CSS ellipses ("...") to truncate yet even lon...
How can I exclude directories from grep -R?
...n regarding syntax and usage see
The GNU man page for File and Directory Selection
A related StackOverflow answer Use grep --exclude/--include syntax to not grep through certain files
For older GNU Greps and POSIX Grep, use find as suggested in other answers.
Or just use ack (Edit: or The Silve...
IISExpress returns a 503 error from remote machines
... One more hint: If you right-click on IISExpress' systray icon, you can select "Show all applications" which will open up a dialog showing all applications you're currently running locally. Right-click on the desired application (don't left-click or it will open the browser), then you will see "P...
How do I find files with a path length greater than 260 characters in Windows?
...$outputFilePath, $false)
Get-ChildItem -Path $pathToScan -Recurse -Force | Select-Object -Property FullName, @{Name="FullNameLength";Expression={($_.FullName.Length)}} | Sort-Object -Property FullNameLength -Descending | ForEach-Object {
$filePath = $_.FullName
$length = $_.FullNameLength
...