Hello suno, and welcome to the Monastery!

As other monks have said, your question isn’t clear. The following is a guess at what you wanted:

#! perl
use strict;
use warnings;

my @lines    = ("First line\n",
                "Second line\n",
                "Third line\n",
                "Fourth line\n",
                "Fifth line\n",);
my @keywords = qw(Second Fourth);
my @matches;

for (my $i = 0; $i < $#lines; ++$i)
{
    my ($first_word) = $lines[$i] =~ /^\s*(\w+)\b/;

    for (@keywords)
    {
        if ($_ eq $first_word)                  # Look for a keyword
        {
            chomp(my $line1 = $lines[$i    ]);  # *see below
            chomp(my $line2 = $lines[$i + 1]);  # *see below
            push @matches, $line1 . $line2;
            last;
        }
    }
}

my $count;
print 'Match ', ++$count, ": '$_'\n" foreach @matches;

[download]

Output:

Match 1: 'Second lineThird line'
Match 2: 'Fourth lineFifth line'

[download]

The key lines of code are the ones marked *see below. By applying chomp to a newly-created variable, the code removes the newline (if any) from the end of a copy of each line of text, without changing the original lines in the array.

HTH,

Athanasius <°(((>< contra mundum

In reply to Re: chomp question by Athanasius
in thread chomp question by suno

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