Limiting the consecutive occurrence

[Pixel]

Yikes !!! I get some sleep and return to this thread and it has moved on more than I could imagine !!

@Pixel and ntk you are doing some great work and have some good idea’s, I will have to answer briefly I’m afraid as there is too much to write about this and if I don’t get a reply in quick things will move on so fast I may as well not bother !!!

Sorry if I seem to be rushing you Hash-IT, don't mean too....
I've just been trying to do this for a long time and had a feeling sed could do what I wanted, its just that don't have a clue how to use sed properly. So its great when I find someone who has (I think) has the same goal as me, you. As well as someone who can use sed properly M@LIK.

Another interesting thing to consider is I used ULM’s regular expressions to do some of this filtering on a text file and it does it much faster. I am purely guessing it would be done in 5 hours or so.

I think filtering an existing list may be faster than generating one then pushing it through SED.

Well can't we convert the sed commands over to regular expression? (thats another one that confuses me)