ruby - Create array of ranges with loop, combine ranges to array of Fixnum -

i'm looping through set of foo have starting_postion , size

if ! foo.position.nil?     @foo_top = foo.position + foo.size - 1     @occupied_array = (foo.position..@foo_top)   end 

i see reassigning array on each loop. end goal combine of ranges in array of fixnums can compare.

should just: @occupied_array += (foo.position..@foo_top) , @occupied_array.to_a later?

thanks

if understand correctly, have array of foo objects each represent range of integers start , length. , want produce single array of integers representing values covered of foo objects.

if that's true, try following:

foo = struct.new(:position, :size) all_the_foos = [foo.new(10,3), foo.new(3,3), foo.new(15,5)] p all_the_foos.flat_map { |f| (f.position...(f.position+f.size)).to_a }.uniq.sort  #=> [3, 4, 5, 10, 11, 12, 15, 16, 17, 18, 19] 

not sure whether #uniq or #sort desired, remove necessary.