shift sublist

Replies to This Discussion

Permalink Reply by Aman S Yusuf on April 18, 2013 at 7:40am

More of something like this....

Permalink Reply by David Rutten on April 18, 2013 at 7:46am

So you want to move the first item from every list to the first element in the next list?

You might be able to use the Path Mapper with a clever expression to do it:

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by David Rutten on April 18, 2013 at 7:50am

And if you want the last item to wrap around, you can add a modulus to the expression as well:

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Aman S Yusuf on April 18, 2013 at 8:08am

I dont need it to wrap. Im trying to get familiar with the path mapper. did you type exactly what is in the image above into the "source" and the "target" in the path mpaper window?

Permalink Reply by David Rutten on April 18, 2013 at 8:36am

Yes. The Source field is always easy to fill in because you don't have a choice. You have to reproduce your data tree paths accurately. Your only choice is whether to omit the item index. In my case the only valid source text would have been:

• {A}
• {A}(i)

Since I needed the item index for the logic I had to go for the latter.

The target is the hard bit. I want to keep the same index for every item, so I can reproduce the (i) bit:

{somethingdifficultgoeshere}(i)

The path of the item however depends on the item index. The first item in every list (first item always has index = 0) needs to go to the next list. Since my lists are well numbered ({0}, {1}, {2} etc.) I can just add 1 to the list number to always get the next list. That's where the A+1 comes in. The if statement is there to make sure that only the first item in each list goes into the next list. Thus

{ If(i=0, A+1, A }(i)

translates to "The new list number depends on the item index. If the index equals zero, then the target list number is the source list number plus one. If the index does not equal zero, then the target list number is the same as the source list number."

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by AB on April 18, 2013 at 1:24pm

that description was helpful. Thank you

Permalink Reply by Aman S Yusuf on April 18, 2013 at 7:51am

this is exactly what im trying to do. how did you do that!