用字符串对列表赋值,一个字符串对应一个列表元素,eg: my @escaped = "asteriskasterisk hash access unpack_func";
my @escaped = "asteriskasterisk hash access unpack_func"; # 是一个元素的赋值
25 unless( $escaped[1] ){
26 print "\$escaped[1] is undef.";
27 }
输出:$escaped[1] is undef.