in reply to Re: how to extract multiple pattern into array
in thread how to extract multiple pattern into array

... local $/ = ""; ... will cause the entire file to be slurped ...

From  perldoc -v "$/" (see also perlvar): 

HANDLE->input_record_separator( EXPR )
$INPUT_RECORD_SEPARATOR
$RS
$/      The input record separator ... 
        treating empty lines as a terminator if set to the null string
+ ...
        You may set it to ... "undef" to read through the end of file.
        ...

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The idiomatic Perl statement would be something like
    my $entire_data = do { local $/;  <$filehandle>; };
(if you don't use something like File::Slurp).

Give a man a fish:  <%-(-(-(-<

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Re^3: how to extract multiple pattern into array
by Anonymous Monk on Feb 02, 2015 at 20:27 UTC

    Oops, thanks :-)

[reply]
      I had finished my code , thank you for your help! 
      #!/usr/bin/perl
use 5.010;
use strict;
use warnings;

my $reS = qr{\..*?\s*?\(\s*?([0-9a-zA-Z_]*?)\s*?\)}s;
my $reM = qr{\..*?\s*?\(\s*?\{\s*?(.*?)\s*?\}\s*?\)}s;
open my $fh, "analog_atop_inst.v" or die $!; 
my @fields=();
my @matchM=();
my @matchS=();
my @allfield=();
my $entire_dataS = '';
my $entire_dataM = '';

while (<$fh>) { chomp; $entire_dataS .= $_; $entire_dataM .= $_; }
#print $entire_data;

while (1) { 
if ($entire_dataS =~ /$reS/){
    push @matchS, $1;
    $entire_dataS = $';}
else {
    last;}
}
while (1) { 
if ($entire_dataM =~ /$reM/){
    push @matchM, $1;
    $entire_dataM = $';}
else {
    last;}
}
    #say "@@@@@@@@@@@@  MatchS  @@@@@@@@@@@@@@@@@";
    foreach my $fieldS (@matchS){
          push @allfield, $fieldS ;
    }
    #say "############  MatchM  #################";
    foreach my $fieldM (@matchM){
        my @fieldsplit = split / ,\s+/, $fieldM;
        foreach my $fieldMs (@fieldsplit){
          push @allfield, $fieldMs ;
        }
    }
    foreach my $fieldT (@allfield){
        say $fieldT;
    }

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