# File lib/active_support/core_ext/array/grouping.rb, line 22 def in_groups_of(number, fill_with = nil) if fill_with == false collection = self else # size % number gives how many extra we have; # subtracting from number gives how many to add; # modulo number ensures we don't add group of just fill. padding = (number - size % number) % number collection = dup.concat([fill_with] * padding) end if block_given? collection.each_slice(number) { |slice| yield(slice) } else [].tap do |groups| collection.each_slice(number) { |group| groups << group } end end end