celloritem

  CELLORITEM - Returns the ith element of a cell list, or a single item

    ITEM = CELLORITEM(VAR, [INDEX], [USEINDEXFORVAR])

   This function examines VAR:
     if VAR is a cell list, then it returns the INDEXth element of VAR;
     if VAR is not a cell list, then it returns VAR, unless the user specifies
         that the INDEXth element of var should be returned (USEINDEXFORVAR=1).

     If INDEX is not provided, it is assumed to be 1.
     If USEINDEXFORVAR is not provided, it is assumed to be 0.


   This can be used to allow the user the option of providing a cell list or
   a single entry (Example 1) or to pull an item that may be stored as a cell list or
   a struct (Example 2:, a JSON encoding/decoding into Matlab is underspecified and may result
   in either a cell array or a struct array).

   Example 1:
       mylist1 = {'Joe','Larry','Curly'};
       mylist2 = 'Joe';

       for i=1:3, 
            celloritem(mylist1,i),
            celloritem(mylist2,i),
       end;

   Example 2: 
      myotherlist1 = [1 2 3];
      myotherlist2 = { [1] [2] [3]};

      for i=1:3,
            celloritem(myotherlist1,i,1),
            celloritem(myotherlist2,i,1),
      end