Thanks all, here comes the update one:
#!/usr/bin/env perl
use strict;
use warnings;
use Carp qw(croak);
use autodie qw(open close);
use File::Basename;
croak "Usage: ./bibextract.pl tex_file.tex" unless defined $ARGV[0];
my $infile = $ARGV[0];
my $tex_file = $infile;
#my $bib_filename = "/home/lina/texmf/bibtex/bib/biophymd.bib";
my $bib_filename = "try.bib";
my $bib_abbrev_filename = "/home/lina/texmf/bibtex/bib/biophyabbrev.bib";
my $extracted_bib = "basename($infile).bib";
my $cited;
my @citeditems;
my $item;
## read all the cited items from .tex file and save it to $cited
open my $fh, '<', $tex_file;
while(<$fh>){
if(/cite\{(\S+)\}/){
$cited = sprintf "%s\n",$1;
$cited =~ tr/\,/\n/; ########### the problem is here.
it
failed to split this to different element in the array @citeditems.
push(@citeditems,$cited);
}
}
close($fh);
## read the .bib database and extract the cited out
open my $fh2, '<', $bib_filename;
foreach $item (@citeditems){
print $item;
#match($item);
#print "a\n";
}
sub match{
my $reg = @_;
LINE: while(my $line = <$fh2>){
if ($line =~ m/$reg\,/ .. $line =~ /^\}$/){ ######## thanks
Tim and
David's suggestion in another thread. I rechecked it worked.
print $line;
#last;
}
}
}
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