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Re: "foreach" loops in IDL [message #64803 is a reply to message #64798]

Fri, 16 January 2009 11:37

pgrigis
Messages: 436
Registered: September 2007

Senior Member

My opinion is that something like that make the
code more difficult to understand and prevent
utilization in two different programs running at the
same time in the same session because of the
common blocks.

Therefore, I don't like the idea very much.

Ciao,
Paolo

alaniwiuse...@googlemail.com wrote:
> In case anyone's interested, I've produced a little hack that lets you
> have "foreach" loops in IDL, i.e. loop over the contents of an array.
> It would be nice if the syntax were to let you have something like:
>
> for myval in myarray do begin
> print, myval
> endfor
>
> Unfortunately it doesn't, unless I've missed something somewhere. And
> it's just a little fiddly to have to loop over an array index every
> time, e.g.:
>
> for i=0, n_elements(myarray) - 1 do begin
> myval = myarray[i]
> print, myval
> endfor
>
> The hack lets you use the following syntax:
>
> foreach, 'myval', myarray
> @do
> print, myval
> @done
>
> and nested loops are supported.
>
> If anyone is interested in having this, grab this a (tiny) download,
> that contains a few short files to put somewhere in your IDL_PATH:
>
> http://home.badc.rl.ac.uk/iwi/idl-foreach.tar.gz
>
> Regards,
> Alan
>
> P.S. Please note that I do not read this mailbox. Do a web search for
> "Alan Iwi" if you want my email address.

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[Message index]

		Re: "foreach" loops in IDL By: R.Bauer on Mon, 19 January 2009 02:31
		Re: "foreach" loops in IDL By: rtk on Fri, 16 January 2009 13:07
		Re: "foreach" loops in IDL By: Vince Hradil on Fri, 16 January 2009 12:43
		Re: "foreach" loops in IDL By: pgrigis on Fri, 16 January 2009 12:34
		Re: "foreach" loops in IDL By: rtk on Fri, 16 January 2009 12:18
		Re: "foreach" loops in IDL By: pgrigis on Fri, 16 January 2009 11:37
		Re: "foreach" loops in IDL By: rtk on Fri, 16 January 2009 10:54
		Re: "foreach" loops in IDL By: JD Smith on Tue, 20 January 2009 13:11
		Re: "foreach" loops in IDL By: alaniwiusenet on Sat, 31 January 2009 04:20

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