Possible Duplicate:
diff a ruby string or array
我有一个旧数组:[1, 2, 3, 4, 5]
,新数组:[1, 2, 4, 6]
如何区别Ruby:删除了5, 3
个,添加了6
个?
Possible Duplicate:
diff a ruby string or array
我有一个旧数组:[1, 2, 3, 4, 5]
,新数组:[1, 2, 4, 6]
如何区别Ruby:删除了5, 3
个,添加了6
个?
irb(main):001:0> a = [1, 2, 3, 4, 5]
=> [1, 2, 3, 4, 5]
irb(main):002:0> b = [1, 2, 4, 6]
=> [1, 2, 4, 6]
irb(main):003:0> a - b
=> [3, 5]
irb(main):005:0> b - a
=> [6]
irb(main):006:0>