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

[Gurusamy Sarathy <gsar@activestate.com>]

On Thu, 13 Jan 2000 13:06:30 EST, Ronald J Kimball wrote:
>If you want to use delete() and exists() on arrays, you really want to use
>a hash instead.

Hashes take a lot more memory than arrays, or haven't you noticed?

>I dread the day when push(), pop(), shift(), unshift(), and splice() are
>extended to work on hashes...

I guess you haven't noticed a tiny module on CPAN that goes by the name
Tie::IxHash, or who had occasion to write it... :-)

But seriously, unless we can make perl's hashes order-preserving with
zero cost (which seems unlikely), push/pop/shift/unshift/splice can
never be supported on hashes.


Sarathy
gsar@ActiveState.com

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Follow-Ups from:

Ronald J Kimball <rjk@linguist.dartmouth.edu>

References to:

Ronald J Kimball <rjk@linguist.dartmouth.edu>

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