Re: match a word and delete last line

#!/usr/bin/perl

# http://perlmonks.org/?node_id=1190966

use strict;
use warnings;

$_ = do { local $/; <DATA> };

s/^(\w+[-_]\d+)\n(?=.*\1\b)//gm;

print;

__DATA__
Text_1
sample-text file Text_1
 matching the 1st line
 matching the last line
Text
text_1
text-2
sample-text file text-2
 matching the 1st line
 matching the last line
[download]

Comment on Re: match a word and delete last line Download Code

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Re^2: match a word and delete last line by ArifS (Beadle) on May 23, 2017 at 14:03 UTC
tybalt89, how do I modify to remove the previous line word if doesn't include (d,_,-) for example if only says Text. `sample-text file Text-1 matching the 1st line matching the last line text text_1 sample-text file text-2 matching the 1st line matching the last line text_1 text-2 text sample-text file text matching the 1st line matching the last line` [download] I need to remove the following ( text ) too- `..................... text_1 text-2 text sample-text file text matching the 1st line matching the last line` [download]	[reply] [d/l] [select]
Re^3: match a word and delete last line by tybalt89 (Monsignor) on May 23, 2017 at 14:17 UTC
Try this, but your question is a little unclear. Please give an exact input and output test case, not a partial one. `#!/usr/bin/perl # http://perlmonks.org/?node_id=1190966 use strict; use warnings; $_ = do { local $/; <DATA> }; s/^(\w+(?:[-_]\d+)?)\n(?=.*\1\b)//gm; print; __DATA__ Text_1 sample-text file Text_1 matching the 1st line matching the last line Text text_1 text-2 sample-text file text-2 matching the 1st line matching the last line text_1 text-2 text sample-text file text matching the 1st line matching the last line` [download]	[reply] [d/l]
Re^4: match a word and delete last line by ArifS (Beadle) on May 23, 2017 at 14:23 UTC
That works. I was missing (?: ). Thank you.	[reply]
Re^2: match a word and delete last line by ArifS (Beadle) on May 23, 2017 at 13:45 UTC
That works. Thank you.	[reply]