小编Jos*_* Ng的帖子

我想算的次数"red"之后"green"这个数组中:

["red", "orange", "green", "red", "yellow", "blue", "green"]

如果它是另一种颜色,代码应该忽略它并继续到数组中的下一个项目.

event_type.each_slice(2) do |red, green|
  break unless green
  count = count + 1
end

p "The count is #{count}"

步骤1:

Look for red

第2步:

IF not last item 
           Compare with next item on array
ELSE       Go to Step 4

第3步:

IF green, count = count + 1
          Go to Step 1
ELSE      Go to Step 2

第4步:

Print Count