是否可以按子哈希值对多维哈希进行排序？

Question

是否可以按子键的值对父哈希进行排序？

例如：

{
    :a => 
        {:order => 3},
    :b =>
        {:order => 1},
    :c =>
        {:order => 2}
}

诉诸于

{
    :b => 
        {:order => 1},
    :c =>
        {:order => 2},
    :a =>
        {:order => 3}
}

Answer 1

您可以将其转换为成对数组，使用sort_by方法来定位要排序的值，然后将其转换回散列：

h = {
    :a => 
        {:order => 3},
    :b =>
        {:order => 1},
    :c =>
        {:order => 2}
}

h.sort_by {|k,v| v[:order]}.to_h
=> {:b=>{:order=>1}, :c=>{:order=>2}, :a=>{:order=>3}}