Re: Weirdness (duplicated data) while building result during parsing using regex

If you add an 'use Data::Dump' to your module and insert lines like

print "4 \$_: '$_'\n", "\$^N: ", dd( $^N ), "\$^R: ", dd( $^R );
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after your 'push' instructions, there is clearly a difference in behavior between your example cases.

Maybe you can figure it out from there?

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Re^2: Weirdness (duplicated data) while building result during parsing using regex by perlancar (Hermit) on Sep 02, 2016 at 10:09 UTC
Thanks for the suggestion, I indeed forgot to try "print"-debugging at every step. Apparently there's a backtracking involved in the case of `[attr() eq 1]` but not in the case of `[attr()=1]`. I should've been suspicious of backtracking whenever some kind of "duplication" happens. Will debug this further.	[reply] [d/l] [select]