ruby怎么实现数组减法

Question

ruby怎么实现数组减法

Answer 1

irb(main):001:0> a=[1,2,5,3,9,0,9]
=> [1, 2, 5, 3, 9, 0, 9]
irb(main):002:0> a-[2]
=> [1, 5, 3, 9, 0, 9]

irb(main):004:0> a
=> [1, 2, 5, 3, 9, 0, 9]

irb(main):005:0> a-[4]
=> [1, 2, 5, 3, 9, 0, 9]