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Group by multiple columns in dplyr, using string vector input
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Does the call to one_of() do anything here? I think it is redundant in this context, as the expression is wrapped in a call to vars().
– knowah
Aug 15 '19 at 14:13
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Using C# regular expressions to remove HTML tags
...y exist
remove all SGML comments
remove the entire HEAD element
remove all SCRIPT and STYLE elements
do Grabthar-knows-what with FORM and TABLE elements
remove the remaining tags
remove the <![CDATA[ and ]]> sequences from CDATA sections but leave their contents alone
That's just off the top...
Outputting data from unit test in python
... %r", self.that )
# etc.
self.assertEquals( 3.14, pi )
if __name__ == "__main__":
logging.basicConfig( stream=sys.stderr )
logging.getLogger( "SomeTest.testSomething" ).setLevel( logging.DEBUG )
unittest.main()
That allows us to turn on debugging for specific tests whi...
Remove the last line from a file in Bash
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Here is a simple bash script that automates it in case you have multiple files with different number of lines at the bottom to delete: cat TAILfixer FILE=$1; TAIL=$2; head -n -${TAIL} ${FILE} > temp ; mv temp ${FILE} Run it for deleting 4 lines...
Find UNC path of a network drive?
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What a practical and quick solution for all of us in corporate lock-down environments! Much appreciated workaround!
– Marcus Mangelsdorf
Sep 17 '19 at 13:14
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how do I check in bash whether a file was created more than x time ago?
...y on it. The only cross-system compatible way I found was to use perl. The script should work on Macs if you replace the corresponding line with this: local changed=$(perl -MFile::stat -e "print stat(\"${filename}\")->mtime") superuser.com/questions/427551/…
– Bijou Tro...
Database Design for Revisions?
... tool that will read the system data dictionary for a table and generate a script that creates the shadow table and a set of triggers to populate it.
Don't try to use XML for this, XML storage is a lot less efficient than the native database table storage that this type of trigger uses.
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Change the image source on rollover using jQuery
...show/hide the rollover image when the onmousemove/onmouseout event happen. All my image names follow the same pattern, like this:
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Case insensitive string compare in LINQ-to-SQL
... accurate when you're trying to do case insensitive equality checks.
Ideally, the best way to do a case-insensitive equality check would be:
String.Equals(row.Name, "test", StringComparison.OrdinalIgnoreCase)
NOTE, HOWEVER that this does not work in this case! Therefore we are stuck with ToUpp...
Utilizing multi core for tar+gzip/bzip compression/decompression
...n and vice versa.
p7zip
For p7zip for compression you need a small shell script like the following:
#!/bin/sh
case $1 in
-d) 7za -txz -si -so e;;
*) 7za -txz -si -so a .;;
esac 2>/dev/null
Save it as 7zhelper.sh. Here the example of usage:
$ tar -I 7zhelper.sh -cf OUTPUT_FILE.tar.7z pa...