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sed command to condense two lines into one

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# 1  
Old 02-07-2013
sed command to condense two lines into one
My eyes glaze over trying to understand multiline sed commands, so please forgive me if this has been asked before. I'd like to condense the following two lines:
Code:
fooPATTERN1
PATTERN2bar

into the following one line:
Code:
foobar

How is that done in sed?
Last edited by Scrutinizer; 02-07-2013 at 04:28 PM.. Reason: quote tags -> code tags
# 2  
Old 02-07-2013
Code:
awk '{ gsub(/[A-Z]|[0-9]/,x); ORS=""; }1' file

OR
Code:
awk '{ gsub(/PATTERN1|PATTERN2/,x); ORS=""; }1' file

Last edited by Yoda; 02-07-2013 at 04:11 PM.. Reason: added
# 3  
Old 02-07-2013
sed:
Code:
sed 'N;s/PATTERN1\nPATTERN2//' infile

Last edited by rdrtx1; 02-07-2013 at 04:03 PM.. Reason: dang! copied from old post... removed not end with 0 exp
# 4  
Old 02-07-2013
Code:
sed 'N;s/PATTERN1\nPATTERN2//' file

Hey rdrtx1, what is the
/0$/! at the beginning of your expression?
# 5  
Old 02-07-2013
I stumbled over this as well... /0$/ ... pls explain!
All above proposals work on exactly the sample file. If you use an extended version, lines above and below the pattened ones, they run into trouble. Pls try this on an extended file and report back:
Code:
$ sed ':Start; N;s/PATTERN1\nPATTERN2//;P;D; T Start' file

It tries to read each line appending it to the previuous, tests against pattern1\npattern2, prints/deletes previous line, reads next...
# 6  
Old 02-07-2013
Code:
sed '/PATTERN1/{N;s/PATTERN1\nPATTERN2//;}' infile

# 7  
Old 02-07-2013
That takes the lead - short, sharp, and to the point; again. Congratulations!
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