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

[Larry Wall <larry@wall.org>]

Tom Christiansen writes:
: Of course I'm serious.  Remember, indices aren't keys.  They're just
: positions.  splice completely removes an entry from an array in a way 
: that undef will not, just as delete completely removes an entry from a
: hash the way that undef will not.

I think they're keys.  They're just constrained to be numeric as
a very valuable hint for optimization.  And in the case of built-in
arrays, determining order.  But that doesn't necessarily apply to
tied arrays.  A tied array could perfectly validly raise an exception
on a pop().

: Now, could someone please tell me what to fill in for XXXXX?

Slightly more seriously, you draw it without the outer bars, leaving
isolated patches of values, as befits a sparse array:


    ----------------    ---------------- 
    |    |    |    |    |    |    |    |
    ----------------    ---------------- 

Larry

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References to:

Tom Christiansen <tchrist@chthon.perl.com>

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