ruby 变量有关问题

ruby 变量问题
def as(flow)
  flow.shift
  flow
end
flow=["1","2","3","4"]
p as(flow)
p flow
怎么样才能让flow的输出值还是["1","2","3","4"]啊？

就是怎么才能让flow成为全局变量。

[解决办法]
什么意思阿？flow.shift就是将数组的第一号元素去掉，所以你这肯定就是["2","3","4"]
要想按照原来的输出你得用个循环了
[解决办法]

Perl code

def as(flow)  tmp = flow.dup  tmp.shift  flowend