ruby - 哈希迭代，以数组为键

Question

假设我有以下代码:

#!/usr/bin/env ruby -wKU

h = {}
h[[1, "a"]] = "first"
h[[2, "b"]] = "second"

puts h.to_yaml

# case 1 - works fine
h.each do |k, v|
  num, char = k
  puts "key = #{[num, char]}; value = #{v}"
end

# case 2 - works fine
h.each_key do | num, char |
  puts "key = #{[num, char]}; value = #{h[[num, char]]}"
end

# case 3 - Doesn't work
# how can I get all three values in one go?
h.each do | [num, char], v |
  puts "key = #{[num, char]}; value = #{v}"
end

我将如何创建一个迭代器，我可以在其中获取 block 参数中分配的所有 3 个值(key[0]、key[1]、value)？这可能吗？

Answer 1

h.each do | (num, char), v |
  puts "key = #{[num, char]}; value = #{v}"
end