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"foreach" loops in IDL [message #64806]

Fri, 16 January 2009 10:30

alaniwiusenet
Messages: 2
Registered: January 2009

Junior Member

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]

		"foreach" loops in IDL By: alaniwiusenet on Fri, 16 January 2009 10:30
		Re: "foreach" loops in IDL By: Giorgio on Fri, 23 January 2009 15:39
		Re: "foreach" loops in IDL By: Vince Hradil on Tue, 20 January 2009 14:57
		Re: "foreach" loops in IDL By: rtk on Tue, 20 January 2009 14:54

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