Re^3: hex code passed from command line is interpreted literally in substitution

Then I guess I misunderstand what you are trying to do:

$find = "\x20"; $rep = "\x30";;

$s = "The quick brown fox jumps over the lazy dog";;

$s =~ s[$find][$rep]eg;;

print $s;;
The0quick0brown0fox0jumps0over0the0lazy0dog
[download]

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

Comment on Re^3: hex code passed from command line is interpreted literally in substitution Download Code

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Re^4: hex code passed from command line is interpreted literally in substitution by Allasso (Monk) on Mar 05, 2011 at 22:27 UTC
I am trying to pass those expressions from the command line. It works fine the way you have your code written, but try this: `my ($find, $rep) = @ARGV; $s = "The quick brown fox jumps over the lazy dog";; $s =~ s[$find][$rep]eg;; ./arg.pl '\x20' '\x30' #prints: The\x30quick\x30brown\x30fox\x30jumps\x30over\x30the\x30lazy\x30dog` [download]	[reply] [d/l]
Re^4: hex code passed from command line is interpreted literally in substitution (strike 3) by tye (Sage) on Mar 10, 2011 at 17:31 UTC
The /e option on your s/// makes no difference there for two reasons. First, you aren't testing what was asked about. `$rep = "\x30";` is identical to `$rep = "0";`. "0" evaluates to "0" so /e makes no difference. Second, `s/.../$rep/` (no /e) does string interpolation on the `$rep` part which results in the value from $rep being used. `s/.../$rep/e` (with /e) interpolates `$rep` as Perl code and the value of `eval '$rep'` is also just the value stored in `$rep`. - tye	[reply] [d/l] [select]
Re^5: hex code passed from command line is interpreted literally in substitution (strike 3) by BrowserUk (Patriarch) on Mar 10, 2011 at 17:51 UTC
Indeed. I completely missed the significance of the problem. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]