in reply to Re: goto HACK
in thread goto HACK

Note that $time++ modifies the element of @times, since 'for' makes $time an alias of each element.

That's kinda creepy! I assumed declaring the var was making a copy of the element that wouldn't change the array. I can't believe I never noticed that... and the same with hash values, but not keys?

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Re^3: goto HACK
by dave_the_m (Monsignor) on Sep 25, 2018 at 11:53 UTC
    Yes, the keys function returns temporary copies of the keys while values returns the actual values. So 
    $_++ for @a;           # modifies each element of @a
$_++ for values %hash; # modifies every value of %hash
$_++ for keys %hash;   # doesn't do anything useful

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    Dave.

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