How to check specific range of values in Array.

Let's see.

Perhaps use wherecontains to get the index of every 113.  In example above you would have {1, 4, 8}.  Put that in a local variable.

Now, break up the list into a list of lists, {{1,2,3},{4,5,6,7},{8, 9, 10, 11, 12, 13}}.  Put that in a local variable.

Then forEach sublist, index(max( wherecontains(code 110))) That should get you {3, 7, 13 [if that's the end of the list for that one]} Put THAT in a local variable.

Now, for each in {1, 4, 8}, subtract date at that index from date at {3, 7, and 13}  Now, you'll have a list of time intervals.  Wrap this last forEach in a max() function, should have it.  May be ways of tweaking this to work more efficient, but it's how I would start.

Do you have an idea how to break up the list that doesn't have a fixed value for the number of elements into a list of lists ( {{1,2,3},{4,5,6,7},{8, 9, 10, 11, 12, 13}} ) as you suggested? As this was just an example, events 113 and 110 can occur anytime and as many times I wont have same structure everytime so, we again return to the original question how do I know what is the end and star of my list/lists/chunks of data? 

a!localVariables(
  local!list: {1001, 1015, 1023, 1025, 1048, 1052, 1067, 1085, 1093, 1099, 1100, 1120, 1130},
  local!indeces: {1, 5, 11},
  a!forEach(
    items:local!indeces,
    expression: if(
      fv!islast,
      index(
        local!list,
        enumerate(length(local!list) - fv!item + 1) + fv!item
      ),
      index(
        local!list,
        enumerate(local!indeces[fv!index + 1] - fv!item) + fv!item
      )
    )
  )
)

This is really helpful as I was able to break up my list to the indexes of code 113. Thx. The part that is not working for me is that I do need to do some calculations with code 113 and last code 110 from the broke up sublists. that I don't know how to find. Basically, the upper code that you provided is returning ok, and the pseudo "Then forEach sublist, index(max( wherecontains(code 110))) That should get you {3, 7, 13 [if that's the end of the list for that one]} Put THAT in a local variable." I'm getting 3,4,6 as the index of the positions of sublists that code 110 contains. 

Yeah, you'll be getting the positions relative to each individual list.  If you grab the ID from that position in each list, and that should map to the right object in the parent, local!list.

 Could you please provide me with a code example for this? Thx in advance. 

Try yourself and in a few hours if you haven't got it I might give it a try.

So What I have done is that based on your suggestion is:
I have created the list of dictionaries as originally described.
For that list, I have extracted the indexes of code 113,
I have used those indexes as indices for the new list of lists, and this part is working fine.
Then I have extracted all 110 of that sublists and also their indexes. I have gotten a Max index of all 110 from all chunks.
What I should do is to map this but I'm missing something. I have tried but no luck still.
Did I go in the wrong direction? Thx.

So What I have done is that based on your suggestion is:
I have created the list of dictionaries as originally described.
For that list, I have extracted the indexes of code 113,
I have used those indexes as indices for the new list of lists, and this part is working fine.
Then I have extracted all 110 of that sublists and also their indexes. I have gotten a Max index of all 110 from all chunks.
What I should do is to map this but I'm missing something. I have tried but no luck still.
Did I go in the wrong direction? Thx.

In your case max would be based on the date, so max (index (sublist, "Date"))

Thx. But it's the same, as the last index of 110 also has the oldest date? I'm not sure how to write this to map the max 110 and 113 so that I can do the calculations properly?.