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Re: Avoiding multiple or complex WHEREs? [message #75308 is a reply to message #75220]

Tue, 22 February 2011 08:29

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Feb 21, 6:55 pm, Gianguido Cianci <gianguido.cia...@gmail.com>
wrote:
> Yeah :-/ I guess I am trying to build something like a HASH with two
> keys for each value... but I could be going about this completely
> backwards!

It depends on how you are going to use it, but this problems suggests
to me making a class that overloaded the brackets, to search for what
you want, and return !null if not found. Internally it could use
hashes, lists or arrays (of values or pointer arrays). The better
choice depends on things like the number of points and whether they
form a grid in ID, whether Ts are integers (I am guessing that
particle IDs are). That way it would be usable doing things like

p_cool=p[[1,3,4],23:100]

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[Message index]

		Re: Avoiding multiple or complex WHEREs? By: cgguido on Mon, 21 February 2011 13:55
		Re: Avoiding multiple or complex WHEREs? By: cgguido on Mon, 21 February 2011 13:46
		Re: Avoiding multiple or complex WHEREs? By: penteado on Mon, 21 February 2011 13:46
		Re: Avoiding multiple or complex WHEREs? By: cgguido on Mon, 21 February 2011 13:34
		Re: Avoiding multiple or complex WHEREs? By: penteado on Tue, 22 February 2011 08:29

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