Re^4: Learning Programming, desperately need to know what information is contained in scalar variables


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Re^4: Learning Programming, desperately need to know what information is contained in scalar variables

by Anonymous Monk

on Jul 20, 2020 at 15:45 UTC ( [id://11119548]=note: print w/replies, xml )

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in reply to Re^3: Learning Programming, desperately need to know what information is contained in scalar variables
in thread Learning Programming, desperately need to know what information is contained in scalar variables

I see, thank you. I have another question,in this piece of code say "Catastrophic crypto fail!" if $alice eq $bob; what value is $alice eq $bob producing?

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Re^5: Learning Programming, desperately need to know what information is contained in scalar variables
by AnomalousMonk (Archbishop) on Jul 20, 2020 at 16:43 UTC

These things can be found out by experimentation. Experimentation is easy and highly encouraged.

c:\@Work\Perl\monks>perl -wMstrict -le
"use Data::Dump qw(dd);
 ;;
 my $value;
 ;;
 my $alice = 'alice';
 my $bob   = 'alice';
 ;;
 $value = $alice eq $bob;
 dd 'result of evaluating a comparison that is true', $value;
 ;;
 $alice = 'alice';
 $bob   = 'bob';
 ;;
 $value = $alice eq $bob;
 dd 'result of evaluating a comparison that is false', $value;
"
("result of evaluating a comparison that is true", 1)

("result of evaluating a comparison that is false", "")
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Update: Didn't read far enough before posting; question already asked and answered.

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