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Re: HASH question [message #75445 is a reply to message #75367]

Tue, 08 March 2011 10:12

pgrigis
Messages: 436
Registered: September 2007

Senior Member

On Mar 8, 10:56 am, Paulo Penteado <pp.pente...@gmail.com> wrote:
> On Mar 8, 12:05 pm, Paolo <pgri...@gmail.com> wrote:
>
>> well i never thought of "where" as being particularly awkward
>> inefficient, yes if used a lot
>> alternatively the stars could be sorted alphabetically by ID
>> to allow for fast search
>
> Sorted arrays would not be any faster with where(). It would take a
> custom search function to do it.
yes, value_locate

>
>>> the arrays cannot have elements dynamically added or removed,
>
>> you can do concatenatation to add, say, another bunch of 100 stars
>> stars can be removed by setting the ID to the empty string or
>> using array concatenation yet again
>> not extremly efficient but works
>
> Yes, but it is awkward. One big reason for using dynamic containers is
> to avoid all this juggling, allowing one to just do the operation one
> is interested in doing. Like just adding an element. The same goes for
> retrieving or setting an element from a hash: one can just do the
> access, without having to do searches. That way code is not
> complicated to do a conceptually simple task.

Agreed that it is more complicated to do that with structures.

Ciao,
Paolo

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[Message index]

		HASH question By: Gray on Sat, 05 March 2011 05:41
		Re: HASH question By: penteado on Tue, 08 March 2011 10:15
		Re: HASH question By: pgrigis on Tue, 08 March 2011 10:12
		Re: HASH question By: penteado on Tue, 08 March 2011 07:56
		Re: HASH question By: David Fanning on Tue, 08 March 2011 07:11
		Re: HASH question By: pgrigis on Tue, 08 March 2011 07:05
		Re: HASH question By: Gray on Tue, 08 March 2011 04:23
		Re: HASH question By: chris_torrence@NOSPAM on Mon, 07 March 2011 13:38
		Re: HASH question By: penteado on Mon, 07 March 2011 13:05
		Re: HASH question By: penteado on Mon, 07 March 2011 13:02
		Re: HASH question By: chris_torrence@NOSPAM on Mon, 07 March 2011 13:00
		Re: HASH question By: pgrigis on Mon, 07 March 2011 12:32
		Re: HASH question By: Jeremy Bailin on Mon, 07 March 2011 11:15

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