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Shell Programming and Scripting

Swapping three lines

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# 8  
Old 09-20-2010
You saw the error because you did not terminate the first line of your command with a \
# 9  
Old 09-20-2010
no, backslash doesn't help:
Code:
dsjkvf on Penelope @ ~/tmp/devel> cat data 
<date>some_date</date>
<text>some_text</text>
<name>some_name</name>
dsjkvf on Penelope @ ~/tmp/devel> echo data | sed 's/<text>\(.*\)<\/text>\
<name>\(.*\)<\/name>/\2 - \1/'
sed: 1: "s/<text>\(.*\)<\/text>\ ...": unterminated substitute pattern

# 10  
Old 09-20-2010
Hmm, I get:
Code:
$ cat data
  <date>some_date</date>
  <text>some_text</text>
    <name>some_name</name>
$ cat data | sed 's/<text>\(.*\)<\/text>\
<name>\(.*\)<\/name>/\2 - \1/'
  <date>some_date</date>
  <text>some_text</text>
    <name>some_name</name>
$ cat data| sed 's/<text>\(.*\)<\/text>
<name>\(.*\)<\/name>/\2 - \1/'
sed: -e expression #1, char 22: unterminated `s' command

So no error message. Are you on Solaris?
Is the backslash the last character on the line?
# 11  
Old 09-20-2010
I'm on Mac OS X 10.5.8 Smilie.

however, if I use GNU sed version 4.1.5 (from ports) then, yes, it works without errors, but also without any results, I'd say: the sed command above we were testing should output:
Code:
some_name - some_text

, but it just prints the contents of the file 'data' without applying any filters.

where am I wrong?
# 12  
Old 09-20-2010
Hi, as I wrote in my first post, this command would not work since sed is line based, you would have to join the next lines with the N command (I gave an example).
# 13  
Old 09-20-2010
so, as I supposed after your first answer, it seems that it just can't use a two-line search pattern, but can only operate split lines as a substitute pattern.
# 14  
Old 09-21-2010
Quote:
my $cnt=0;
while(<DATA>){
if(/>(.*)</){
push @arr, $1;
$cnt++;
}
if($cnt==3){
print $arr[2]," ",$arr[1],":",$arr[0],"\n";
$cnt=0;
@arr=();
}
}
__DATA__
<date>some_date</date>
<text>some_text</text>
<name>some_name<name>
<date>some_date</date>
<text>some_text</text>
<name>some_name<name>
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