substitution

I am trying to write a short script in which I use sed to search a stream, then perform a substitution on the stream based on the results of a shell function, which requires arguments from sed, e.g. #!/bin/sh function test { echo "running test" echo $1 } sed -n -e "s/.*\(00\).*/$(test)/p" < testfile.txt where testfile.txt contains: 1234 2345 3006 4567 (with newlines between each; they are getting removed by your sites formatting). So ok that script works for me (output "running test"), but obviously has no arguments passed to test. I would like the sed line to be something like: sed -n -e "s/.

When I try to refer to two process substitution pipes in a bash function, only the first one referenced works. The second one gives a "bad file descriptor" error like so: $ foo(){ > cat "$1" > cat "$2" > } $ foo <(echo hi) <(echo bye) hi cat: /dev/fd/62: Bad file descriptor $ It appears that the second pipe is dropped once one is referenced, but a) I cannot seem to confirm this behavior in any documentation and b) I wish it wouldn't. =) Any ideas on what I'm doing wrong? FWIW I'm doing this to make a wrapper to use Mac OS X's FileMerge graphical diff tool instead of the command line one, which

Is there a way to replace text with a regex inline, rather than taking the text from a variable and storing it in a variable? I'm a perl beginner. I often find myself writing my $foo = $bar; $foo =~ s/regex/replacement/; doStuff($foo) where I'd really like to write doStuff($bar->replace(s/regex/replacement/)); or the like, rather than using a temporary variable and three lines. Is there a way to do this? Obviously when the regex is sufficiently complicated it makes sense to split it out so it can be better explained, but when it's just s/\s//g it feels wrong to clutter the code with additional

Suppose you have this text: name1 = "John"; age1 = 41; name2 = "Jane"; age2 = 32; name3 = "Mike"; age3 = 36; ... and you want to split each line into two lines to give a result like this: name1 = "John"; age1 = 41; name2 = "Jane"; age2 = 32; name3 = "Mike"; age3 = 36; ... How would you automate this operation? Some notes: I already tried the following method: (1) Select the text in virtual-vode, (2) Execute :'<,'>:norm ^3f r^M ***, but it doesn't work correctly; it splits only half of the lines, because after every line is broken, the next repetition of the command applies to the rest of the

Is it possible to create a single regexp to replace < and > with their entity equivalents in Komodo Edit? s/<|>/<|>/ I'm guessing that you may have to convert & to & and so on. If this is the case there's most likely a library or function in whichever language/platform you're using (e.g. in Java check out StringEscapeUtils ). Indicate which language you're using and someone here will no doubt point you to something appropriate. It is easy in to do this in just about any language without using regex: PHP: $xml = str_replace(array('>', '<'), array('>','<'), $xml); Python: xml = xml.replace('>',

The process substitution works with filenames fine, e.g. both $ cat <FILENAME and $ while read i; do echo $i; done <FILENAME work. But if instead of FILENAME we use echo command (or any other, which generates output to stdout), cat continues to work $ cat <(echo XXX) XXX while the loop $ while read i; do echo $i; done <(echo XXX) bash: syntax error near unexpected token `<(echo XXX)' produces error. Any ideas why? Note: < filename is not process substitution. It's a redirection . Process substitution has the format <( command ) . Process substitution substitutes the name of a process for the <