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Re^3: grep : partial and/or exact match

by AnomalousMonk (Bishop)
on Jun 17, 2020 at 07:12 UTC ( #11118179=note: print w/replies, xml ) Need Help??

in reply to Re^2: grep : partial and/or exact match
in thread grep : partial and/or exact match

Again, please read Building Regex Alternations Dynamically for a very effective approach to this problem.

Give a man a fish:  <%-{-{-{-<

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Re^4: grep : partial and/or exact match
by Sidd@786 (Initiate) on Jun 17, 2020 at 09:53 UTC
    my $file1 = \<<"END1"; he/is/man/reg[30] what/goes/on/reg[32] i_am_a_man you_are_reg[60] END1 my $file2 = \<<"END2"; /is/man/reg[30] are_reg[60] try/to/do/reg[65] you/reg[31] END2 open(my $f3, ">", "C:/Users/Siddharth/Desktop/two.txt") or die "Can't open < input.txt: $!"; open my $h2, '<', $file2 or die "cannot open file2"; my %map = <$h2>; my ($regex) = map { qr/$_/ } # 2. join '|', map {quotemeta} close $h2; open my $h1, '<', $file1 or die "cannot open file1"; my @a1= <$h1>; #print grep {$_ =~ $regex} @a1; print $f3 grep {$_ !~ $regex} @a1;

    2020-06-21 Athanasius added code tags.

      i have written above as modified version of previous code(partial mismatching)with the help of reference given by you all as a link,still i am not getting correct output. all lines of file1 are coming as output. whereas output should come as 1. what goes on reg32 2. i_am_a_man please help

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