从其键属于数组的哈希中选择键值对

Question

我有一系列的钥匙:

keys = ["first_name", "last_name", "foo"]

和哈希:

hsh = {"first_name" => "tester", "zoo" => "loo", "foo" => "bar"}

我想提取其键存在于数组中的键值对,以获得:

res = {"first_name" => "tester", "foo" => "bar"}

有没有办法做到这一点？

Answer 1

hsh.slice *keys
# => {"first_name" => "tester", "foo" => "bar"}

Answer 2

尝试这个：

hsh.select{ |k, v| keys.include?(k) }