Question

我是ruby的新手，想知道如何迭代这个数组中的以下哈希。

这是我的代码：

x = {:country => "china", :people=>'chinese'}
y = {:country => "india", :people=>'indians'}
z = {:country => "iran", :people=>'iranians'}

countries = [x, y, z]

我想让我的代码吐出来：

'你有3个国家'

第一个名字是：china 第二个名字是：印度第三个名字是伊朗

Answer 1

我认为你的意思是：

x = {:country => "china", :people=>'chinese'}
y = {:country => "india", :people=>'indians'}
z = {:country => "iran", :people=>'iranians'}

countries = [x, y, z]

如果是这样，你可以通过

来计算

puts "You have #{countries.size}"

您可以执行以下每个国家/地区名称输出：

countries.each_with_index do |country, index|
  puts "#{index}. #{country[:country]}"
end

Answer 2

x = {:country => "china", :people=>'chinese'}
y = {:country => "india", :people=>'indians'}
z = {:country => "iran", :people=>'iranians'}

countries = [x, y, z]

countries.each.with_index(1) do |value, index|
   puts "The name of country #{index} is #{value[:country]}"
end

我如何迭代数组的哈希值

2 个答案: