You can try this, since your replacement characters are different for each substitution. 
#! /usr/bin/perl

use strict;

my $str='<    <    PU-------------
doc    doc    S-NN-----------
id    id    S-MN-----------
=    =    X--------------
"    "    PU-------------';

$str =~ s/\n//g;
$str =~ s/\s+/\//g;
$str =~ s/(-){2,}/ /g;
print "$str\n";

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In reply to Re: Perl starter with big problem. by brsaravan
in thread Perl starter with big problem. by b_vulnerability

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