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Pipe output and capture exit status in Bash
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@DaveKennedy: Dumb as in "obvious, not requiring intricate knowledge of bash syntax"
– EFraim
Mar 2 '16 at 18:18
10
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Is there a way to ignore header lines in a UNIX sort?
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You could probably piece together something where you use cat to redirect the stdin to a temporary file, then run the above command on that new file, but it's starting to get ugly enough that it's probably better to use one of the awk-based solutions given in the other responses.
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Is there a way to make R beep/play a sound at the end of a script?
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I have a package (beepr) with the sole purpose of making notification sounds in R which should work cross-platform. Run the following to install beepr and make a sound:
install.packages("beepr")
library(beepr)
beep()
More info at github: https://github.com/rasmusab/beepr
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INSERT statement conflicted with the FOREIGN KEY constraint - SQL Server
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In your table dbo.Sup_Item_Cat, it has a foreign key reference to another table. The way a FK works is it cannot have a value in that column that is not also in the primary key column of the referenced table.
If you have SQL Server Management Studio, ...
Read user input inside a loop
...he regular stdin through unit 3 to keep the get it inside the pipeline:
{ cat notify-finished | while read line; do
read -u 3 input
echo "$input"
done; } 3<&0
BTW, if you really are using cat this way, replace it with a redirect and things become even easier:
while read line; do
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How to get the command line args passed to a running process on unix/linux systems?
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There are several options:
ps -fp <pid>
cat /proc/<pid>/cmdline | sed -e "s/\x00/ /g"; echo
There is more info in /proc/<pid> on Linux, just have a look.
On other Unixes things might be different. The ps command will work everywhere, the /proc stuff ...
Regex to test if string begins with http:// or https://
....test('http://www.bbc.co.uk/sport/cricket'); // true
/^https?:\/\//.test('ftp://www.bbc.co.uk/sport/cricket'); // false
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What are the most common non-BMP Unicode characters in actual use? [closed]
... WITH TEARS OF JOY, is the most common one on Twitter's public stream. It occurs more frequently than the tilde!
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Replace multiple characters in a C# string
...s is not optimal as it's very slow compared to regular string operations, according to a first benchmark article I found when searching "c# regex performance replace" it's about 13 times slower.
– too
Apr 28 '15 at 9:37
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Convert a Git folder to a submodule retrospectively?
... @DominicTobias: git clone source destination simply tells Git the location of where to put your cloned files. The actual magic to filter your submodule's files then happens in the filter-branch step.
– knittl
Mar 23 '17 at 17:35
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