Re: exists $foo[7] and delete $foo[7]

[london@pixelmagic.com]

delete on an array index should remove that index from the array,
such that the array is shorter.

these two snippets of pseudo-code should print out the same number,
but if delete(array_index) only sets the value to undef, they will
print out different values.

my %hash = {name=>'luke', occupation=>'jedi');
delete('name');
my @hash_keys=keys( %hash );
print scalar(@hash_keys);
  1

my @array = ( luke, jedi );
delete(0);
my @array_keys=keys( @array );
print scalar(@array_keys);
 2

if this happens, there is a strangeness introduced into perl
that gives inconsistent behaviour depending on whether you
are playing with a hash or an array.

Greg

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Follow-Ups from:

Larry Wall <larry@wall.org>
Nick Ing-Simmons <nick@ing-simmons.net>

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