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in reply to How to format such a string?

What are your rules to transform the input string to the output string?

I don't see any obvious connection, so can't help much.

Once you've sorted out the rules then I'd use split,length & join

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Re^2: How to format such a string?
by Anonymous Monk on Jun 16, 2013 at 00:45 UTC
    It is actually the boundaries of the small substrings... So, in my example, you have: i3-12o36-45i76-88o, which means that the "original" string starts with i, then from 3-12 we have M, then we have o, then from 36-45 we have M again, then i etc...
[reply]

      Ok -- is your output format fixed? I think run length encoding could be more compact and easier to work with, but maybe that's just me.

      So your string would rle as 2i10M23o...

[reply]

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