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(code) RE: Scalars as hash keys? (solution!)

by ybiC (Prior)
on Oct 27, 2000 at 08:34 UTC ( #38773=note: print w/ replies, xml ) Need Help??


in reply to Scalars as hash keys?

Here's what I finally came up with.

This time around thanks go to Fastolfe and chromatic for all but drawing me a picture of how to use Tie::IxHash, to tilly for pointing me to Data::Dumper recently on an unrelated question in the Chatbox, to ChOas for Yet Another (simpler) Way To Do It, and to AgentM even though I didnt' use his idea.

/msg's or replies welcome if any fine Monks spot something I'm doing in a dumb or dangerous manner.
    cheers,
    Don
    striving for Perl Adept

1 #!/usr/bin/perl -w 2 # getpass.pl 3 4 5 use strict; 6 use Term::ReadKey; 7 use Tie::IxHash; 8 #use Data::Dumper; # Only for testing. 9 #use vars qw(); # Don't need if all vars declared with "my". 10 11 12 # Tied hash of on-screen prompts for old/new passwords 13 tie my %prompts, "Tie::IxHash" 14 %prompts = ( 15 'Enter old password:' => 'oldpass', 16 'Enter old enable password:' => 'oldenable', 17 'Enter new password:' => 'newpass', 18 'Confirm new password:' => 'passconf', 19 'Enter new enable password:' => 'newenable', 20 'Confirm new enable password:' => 'enableconf', 21 ); 22 23 24 # Walk through each prompt to populate a new tied Hash of passwords +: 25 print "Prompting for passwords (no screen echo)\n\n" 26 tie my %passwds, "Tie::IxHash" 27 for my $prompt (keys %prompts) { 28 print " $prompt " 29 ReadMode('noecho'); # don't echo to screen. 30 chomp(my $input = <STDIN>); 31 $passwds{$prompts{$prompt}} = $input; 32 ReadMode(0); # re-activate screen echo. 33 print "\n" 34 } 35 print "\n" 36 37 38 # Create named scalars for %passwds values: 39 # Probably a kludge-free way to do this, 40 # but I haven't encountered it yet. 41 my $oldpass = ($passwds{"oldpass"}); 42 my $oldenable = ($passwds{"oldenable"}); 43 my $newpass = ($passwds{"newpass"}); 44 my $passconf = ($passwds{"passconf"}); 45 my $newenable = ($passwds{"newenable"}); 46 my $enableconf = ($passwds{"enableconf"}); 47 48 49 ## Following stuff only for testing, 50 ## since they display what's so carefully hidden 51 ## using Term::Readky's ReadMode('noecho'). 52 53 54 # print values via named scalars: 55 #print $oldpass, "\n" 56 #print $oldenable, "\n" 57 #print $newpass, "\n" 58 #print $passconf, "\n" 59 #print $newenable, "\n" 60 #print $enableconf, "\n" 61 62 63 # print values individually: 64 #print $passwds{"oldpass"}, "\n" 65 #print $passwds{"oldenable"}, "\n" 66 #print $passwds{"newpass"}, "\n" 67 #print $passwds{"passconf"}, "\n" 68 #print $passwds{"newenable"}, "\n" 69 #print $passwds{"enableconf"}, "\n" 70 #print "\n" 71 72 73 # print all key/value pairs for both hashes: 74 #print Dumper(%prompts), "\n" 75 #print Dumper(%passwds), "\n" 76 77 78 # print all 6 key/value pairs: 79 #while ((my $key, my $value) = each %passwds) { 80 # print " $key => $value\n" 81 #} 82 #print "\n" 83 84 85 # print all 6 keys: 86 #for my $passwd (keys %passwds) { 87 # print " $passwd \n" 88 #} 89 #print "\n" 90 91 92 # print all 6 values: 93 #for my $passwd (values %passwds) { 94 # print " $passwd \n" 95 #} 96 #print "\n"


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