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Re: HASH -- bug, or "feature"? [message #75875 is a reply to message #75874]

Wed, 20 April 2011 13:33

Mark Piper
Messages: 198
Registered: December 2009

Senior Member

Here's an example of the technique Mike suggests:

IDL> names = list('red', 'green', 'blue')
IDL> colors = hash()
IDL> colors[names[0]] = [255,0,0]
IDL> colors[names[1]] = [0,255,0]
IDL> colors[names[2]] = [0,0,255]

IDL> print, colors ; order is mangled
green: 0 255 0
blue: 0 0 255
red: 255 0 0

IDL> foreach n, names do print, n, colors[n] ; ordered
red 255 0 0
green 0 255 0
blue 0 0 255

This also works with an array (and a FOR loop) instead of a list.

mp

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[Message index]

		Re: HASH -- bug, or "feature"? By: Gray on Thu, 21 April 2011 04:20
		Re: HASH -- bug, or "feature"? By: penteado on Wed, 20 April 2011 15:09
		Re: HASH -- bug, or "feature"? By: Gray on Wed, 20 April 2011 14:26
		Re: HASH -- bug, or "feature"? By: Mark Piper on Wed, 20 April 2011 13:33
		Re: HASH -- bug, or "feature"? By: Paul Van Delst[1] on Wed, 20 April 2011 12:50
		Re: HASH -- bug, or "feature"? By: Michael Galloy on Wed, 20 April 2011 12:19

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