Coffeescript Array Indexing

Question

If I have an array of photos in coffeescript

photos = [ly.p1, ly.p2, ly.p3, ly.p4, ly.p5, ly.p6, ly.p7, ly.p8, ly.p9, ly.p10, ly.p11, ly.p12]

for photo, i in photos
    photoMask = new Layer

How can I write my for loop so that the resulting photoMask objects are outputted as photoMask1, photoMask2, photoMask3 .. photoMask12 ?

EDIT: Further elaboration

Maybe the best way to explain this is what I am trying to do in psuedocode:

for photo, i in photos
    photoMask[i] = new Layer
    photoMask[i].addSubLayer(photo)

So ly.p1 would have a corresponding photoMask1. That way, I can access photoMask1 separately and independently.

Why do you want to create 12 variables when an array or object would be easier to work with? — mu is too short
– mu is too short, Commented Jul 6, 2015 at 23:48
@muistooshort its the nature of the tool that I am using. Any ideas here? — Nick Bewley
– Nick Bewley, Commented Jul 7, 2015 at 0:17
Are you sure the tool requires a bunch of variables? That doesn't make sense, what is this tool? — mu is too short
– mu is too short, Commented Jul 7, 2015 at 2:23
Hey @muistooshort thanks for the comments. I added some context above if you have any ideas that might help. I appreciate your commentary so far. — Nick Bewley
– Nick Bewley, Commented Jul 8, 2015 at 3:18
.. And the tool I'm using is a prototyping tool called Framer.js. I am trying to create layers (ex photoMask1) to correspond with their parent layer (ex. ly.p1) so that I can access photoMask1 separately and independently. Currently, the photoMask objects are created, but they aren't named so I cannot access them later. Any kind of method to do this is really the goal here. Thanks a ton for any ideas. — Nick Bewley
– Nick Bewley, Commented Jul 8, 2015 at 3:22

Exinferis · Accepted Answer · 2015-07-07 11:55:24Z

1

While I agree to the commenters about this being a bit strange, you could use something like this:

photos = [ly.p1, ly.p2, ly.p3, ly.p4, ly.p5, ly.p6, ly.p7, ly.p8, ly.p9, ly.p10, ly.p11, ly.p12]

masks = {}

for photo, i in photos
    photoMask = new Layer
    masks["photoMask#{i}"] = photoMask

This will create dynamic keynames within the masks object. If you really need them globally (in the browser) you could do the same thing with the window object.

But without knowing what exactly you're trying to do, I wouldn't recommend any of the above.

answered Jul 7, 2015 at 11:55

Exinferis

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1 Comment

Nick Bewley Over a year ago

Thanks that is great to know. I added more context to the question above. I would greatly appreciate it if you have further insight into this problem. Thanks very much for your help so far.

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