有趣的perl

引用《大骆驼》中那一个例子：jacob has four wives

将一个列表当成一个标量 []
$wife{"Jacob"} = ["Leah", "Rachel", "Bilhah", "Zilpah"];
$wife{"Jacob"}[0] = "Leah";
$wife{"Jacob"}[1] = "Rachel";
$wife{"Jacob"}[2] = "Bilhah";
$wife{"Jacob"}[3] = "Zilpah";

every wife has her own kids
将散列结构也当成一个标量 {}
$kids_of_wife{"Jacob"} = {
"Leah" => ["Reuben", "Simeon", "Levi", "Judah", "Issachar", "Zebulun"],
"Rachel" => ["Joseph", "Benjamin"],
"Bilhah" => ["Dan", "Naphtali"],
"Zilpah" => ["Gad", "Asher"],
};

$kids_of_wife{"Jacob"}{"Leah"}[0] = "Reuben";
$kids_of_wife{"Jacob"}{"Leah"}[1] = "Simeon";
$kids_of_wife{"Jacob"}{"Leah"}[2] = "Levi";
$kids_of_wife{"Jacob"}{"Leah"}[3] = "Judah";
$kids_of_wife{"Jacob"}{"Bilhah"}[1] = "Naphtali";
$kids_of_wife{"Jacob"}{"Zilpah"}[0] = "Gad";
$kids_of_wife{"Jacob"}{"Zilpah"}[1] = "Asher";