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Making Python loggers output all messages to stdout in addition to log file
...places but in addition always be copied to stdout . This is to avoid duplicating messages like:
10 Answers
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Which are more performant, CTE or temporary tables?
....
Only 15 rows of the 1,000,000 randomly generated values match the predicate but the expensive table scan happens 16 times to locate these.
This would be a good candidate for materializing the intermediate result. The equivalent temp table rewrite took 25 seconds.
INSERT INTO #T
SELECT *,
...
console.writeline and System.out.println
...err/.in and System.console():
System.console() returns null if your application is not run in a terminal (though you can handle this in your application)
System.console() provides methods for reading password without echoing characters
System.out and System.err use the default platform encoding, w...
Signed to unsigned conversion in C - is it always safe?
...t to the wrong parts within the answer ?
– Shmil The Cat
Sep 3 '14 at 10:27
For converting signed to unsigned, we add ...
show all tags in git log
... can see it in output of "git show <tag>" and also in output of "git cat-file -p <tag>", where <tag> is heavyweight tag, e.g. v1.6.3 in git.git repository),
and also is default name of tag reference (reference in "refs/tags/*" namespace) pointing to a tag object.
Note that the...
Git, rewrite previous commit usernames and emails
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This just made duplicates of all the commits with the email I wanted to change. Doesn't appear to rewrite history. @Olivier Verdier's solution worked for me.
– Jake Wilson
Nov 21 '17 at 16:10
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Jump to matching XML tags in Vim
...st understand 'i'. cit changes the interior of the tag - just the content. cat change all of the tag - the contents and also the tag itself, both opening and closing.
– Edward
Aug 11 '13 at 22:03
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Bash set +x without it being printed
... on) set -x ;;
off) set +x ;;
esac
}
alias xtrace='{ _xtrace $(cat); } 2>/dev/null <<<'
This allows you to enable and disable xtrace as in the following, where I'm logging how the arguments are assigned to variables:
xtrace on
ARG1=$1
ARG2=$2
xtrace off
And you get outpu...
Find running median from a stream of integers
...d Jan 28 '17 at 11:01
Shmil The Cat
4,35422 gold badges2323 silver badges3434 bronze badges
answered May 18 '12 at 18:15
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Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...pidfile:
LOCKFILE=/tmp/lock.txt
if [ -e ${LOCKFILE} ] && kill -0 `cat ${LOCKFILE}`; then
echo "already running"
exit
fi
# make sure the lockfile is removed when we exit and then claim it
trap "rm -f ${LOCKFILE}; exit" INT TERM EXIT
echo $$ > ${LOCKFILE}
# do stuff
sleep 1000
r...