切片用法可在數組和哈希中提取值

數組中取數組

my @array = qw(aa bb cc dd);my @select = @array[1,3];print "@select\n";##輸出bb dd123456

哈希中取值

my %hash = (    "a" => 1,    "b" => 2,    "c" => 3,    "d" => 4,

);my @select = @hash{qw(a c)}; ## 提取key為‘a’‘c’對應的值print "@select\n";##輸出為1 31234567891011

哈希中取哈希

my %hash = (    "a" => 1,    "b" => 2,    "c" => 3,    "d" => 4,

);my %select = %hash{qw(a c)}; ##提取key為‘a’‘c’的hashmap {print "$_=> $select{$_}\n"} keys %select;##輸出為：a=> 1c=> 3

perl切片（數組和哈希）二