Re^3: Understanding Perl context (removing duplicates from array)

Its misleading, because the next maintainer might think he can replace undef with 0 and bang!

Cheers Rolf
_{(addicted to the Perl Programming Language and ☆☆☆☆ :)

Je suis Charlie!}

Comment on Re^3: Understanding Perl context (removing duplicates from array)

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Re^4: Understanding Perl context (removing duplicates from array) by AnomalousMonk (Archbishop) on Apr 19, 2015 at 14:27 UTC
Hmmm... Hadn't thought about that. But in the specific case of the OPed code, replacing `undef` with 0 (or, indeed, with 1 or any other value) would make no difference: you still end up with a hash of unique keys. And in the general case, if code did depend on the difference between `undef` and 0 as values, would not this dependence be underscored by the explicit use of `undef` as the initializer (reinforced, one would hope, by a comment) rather than the more general `()` empty list? Give a man a fish: `<%-(-(-(-<`	[reply] [d/l] [select]
Re^5: Understanding Perl context (removing duplicates from array) by LanX (Saint) on Apr 19, 2015 at 14:47 UTC
Sorry, I've had too many coworkers in the past using broken copy and paste code and justifying that the cargo cult worked so far. ("Of course it's well tested! I ran it once and nothing bad happened ... " ) Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Je suis Charlie!}	[reply]