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Removing cordova plugins from the project
...rminal (osx) I usually use
cordova plugin -l | xargs cordova plugins rm
Pipe, pipe everything!
To expand a bit: this command will loop through the results of cordova plugin -l and feed it to cordova plugins rm.
xargs is one of those commands that you wonder why you didn't know about before. See...
Which characters need to be escaped when using Bash?
...ash', '-c', 'printf "%q\0" "$@"', '_', arbitrary_string], stdin=subprocess.PIPE, stdout=subprocess.PIPE).communicate() will give you a properly shell-quoted version of arbitrary_string.
– Charles Duffy
Jul 16 '15 at 23:00
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How can I remove the extension of a filename in a shell script?
...iable $filename and send it to standard output
We then grab the output and pipe it to the cut command
The cut will use the . as delimiter (also known as separator) for cutting the string into segments and by -f we select which segment we want to have in output
Then the $() command substitution will ...
psql - save results of command to a file
...om psql's help (\?):
\o [FILE] send all query results to file or |pipe
The sequence of commands will look like this:
[wist@scifres ~]$ psql db
Welcome to psql 8.3.6, the PostgreSQL interactive terminal
db=>\o out.txt
db=>\dt
db=>\q
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How do I limit the number of results returned from grep?
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Note that you cannot use the | head pipe when using grep with -A or -B (and thus not only searching for result (-o), but for context as well). In that case you're left with -m to tell grep the number of lines with results to be returned.
–...
How to do something to each file in a directory with a batch script
...ge the delimiter the for /f command is using. for example, you can use the pipe char.
for /f "delims=|" %%f in ('dir /b c:\') do echo %%f
Update 2: (quick one year and a half after the original answer :-)) If the directory name itself has a space in the name, you can use the usebackq option on th...
How to kill all processes matching a name?
... construct argument list(s) and execute utility. Helpful when you want to pipe in arguments to something like kill or ls or so on.
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How to concatenate multiple lines of output to one line?
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@oink you could pipe the results into sed '$s/..$//' to delete the last 2 characters on the last line.
– Chris Seymour
Jan 19 '17 at 23:27
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Which commit has this blob?
...e, '-|', git => 'ls-tree' => $tree
or die "Couldn't open pipe to git-ls-tree: $!\n";
while ( <$ls_tree> ) {
/\A[0-7]{6} (\S+) (\S+)/
or die "unexpected git-ls-tree output";
return 1 if $2 eq $obj_name;
push @subtree...
Make: how to continue after a command fails?
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Return successfully by blocking rm's returncode behind a pipe with the true command, which always returns 0 (success)
rm file | true
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