獲得在Ruby中數組的區別

Question

可能重複：
diff a ruby string or array

我有一箇舊的陣列：[1, 2, 3, 4, 5]和新：[1, 2, 4, 6]

如何獲得與Ruby的區別：那5, 3已被刪除，6被添加？

Answer 1

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>