当我使用reverse()或sort()时,如果我想稍后使用它,我总是需要将return语句保存到变量中.
@array=qw(Nick Susan Chet Dolly Bill); @array = reverse(@array);@H_502_4@为什么这与使用push(),pop()或shift()不同,您可以只调用该函数并更改数组？
@array=qw(Nick Susan Chet Dolly Bill); push(@array,"Bruce");@H_502_4@那么这些“功能”究竟有什么区别呢？
解决方法
perldoc perlfunc提供了一个主要线索：
@H_502_4@Functions for real @ARRAYs @H_502_4@07001,@H_502_4@并且
07002,
07003,
07004,
07005,
07006,
07007,
07008 @H_502_4@Functions for list data @H_502_4@07009,
070010,
070011,
070012,
070013,
070014,
070015
perldoc perlfaq4解释了数组和列表之间的区别(强调我自己)：
@H_502_4@简而言之,像reverse这样的列表操作是为列表设计的,无法修改. @H_502_4@他们可以接受数组的事实仅仅是列表支持的副作用.What is the difference between a list and an array?
@H_502_4@(contributed by brian d foy) @H_502_4@A list is a fixed collection of scalars. An array is a variable that
holds a variable collection of scalars. An array can supply its
collection for list operations,so list operations also work on arrays @H_502_4@… @H_502_4@Array operations,which change the scalars,rearrange them,or
add or subtract some scalars,only work on arrays. These can’t work on a list,which is fixed. Array operations include
shift,unshift,push,pop,andsplice.