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

[Larry Wall <larry@wall.org>]

Tom Christiansen writes:
: >> I like the potential, but the well- (and strictly-) defined linear
: >> nature of arrays will lead people to believe things like:
: >> 
: >>        $a[100] = '0-99 do not yet exist';
: >>        # later in their code...
: >>        exists $a[23] or die "Why not? \$a[100] exists!";
: 
: >Funny, I am always wondering why perl suddenly claims there are 101
: >elements when I'm fairly sure I've only set 1.
: 
: Funny, I don't recall Perl ever saying that.

Sure it does, if you say scalar(@a).  But then scalar(%a) is also
strange, so it fits.  You have to use keys(@a) to find that actual
number of existing elements.

Larry

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References to:

Tom Christiansen <tchrist@chthon.perl.com>

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