Re: Use of uninitialized value in substitution (s///)

in reply to Use of uninitialized value in substitution (s///)

Line 192 is "$ACETmpltDir = ~s/$ACEEnvironment//g;".

That should be $ACETmpltDir =~ s/$ACEEnvironment//g;. Pay careful attention to the spacing around =~.

What you have at the moment is trying to apply the substitution to $_; then apply ~~logical not~~ (*) bitwise negation (~) to the numeric result of that:

$_='aaaaa'; print s[a][]g;;
5

$_='aaaaa'; print ~s[a][]g;;
18446744073709551610
[download]

and finally assign (=) that to $ACETmpltDir, but it falls at the first hurdle because $_ is undefined.

(*)Corrected. Thanks to AnomalousMonk

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Re^2: Use of uninitialized value in substitution (s///) by AvanTTix (Initiate) on Oct 07, 2011 at 00:02 UTC
THANK YOU! I totally overlooked this part of the syntax, even from the examples I looked up online.	[reply]
Re^3: Use of uninitialized value in substitution (s///) by Anonymous Monk on Oct 07, 2011 at 02:36 UTC
Happened to me just a few hours ago :) That really ought to be a warning, I can't imagine a use case where you want the bitwise negation of the number of substitutions `$foo = ~s///` or matches `$foo = ~m//` every time I've encountered this in the past, its always been a mistake warnings should issue a specific warning	[reply] [d/l] [select]

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