我有深沉的哈希哈希:
my_hash = {
:category_1 => {
:solution_1 => { :order => 1 },
:solution_2 => { :order => 2 }
},
:category_2 => {
:solution_3 => { :order => 3 },
:solution_4 => { :order => 4 }
}
}
我想排序:solution_ *哈希下:category_ *哈希按键:顺序。有什么建议吗?
(固定)
答案 0 :(得分:4)
假设您有以下人员的年龄:
people = {
:fred => { :name => "Fred", :age => 23 },
:joan => { :name => "Joan", :age => 18 },
:pete => { :name => "Pete", :age => 54 }
}
使用sort_by来获取我们想去的地方:
people.sort_by { |k, v| v[:age] }
# => [[:joan, {:name=>"Joan", :age=>18}],
[:fred, {:name=>"Fred", :age=>23}],
[:pete, {:name=>"Pete", :age=>54}]]
答案 1 :(得分:3)
好的,你没有指明你的问题,所以我假设你想要删除一个图层。我稍微更改了起始哈希,以实际查看排序是否有效:
my_hash = {
:category_1 => {
:solution_1 => { :order => 2 },
:solution_2 => { :order => 3 }
},
:category_2 => {
:solution_3 => { :order => 4 },
:solution_4 => { :order => 1 }
}
}
Hash[my_hash.inject({}) { |h, (k, v)| h.merge(v) }.sort_by { |k,v| v[:order] }]
#=> {:solution_4=>{:order=>1}, :solution_1=>{:order=>2}, :solution_2=>{:order=>3}, :solution_3=>{:order=>4}}
编辑:
考虑到您的澄清(并且仍然从我上面发布的修改后的未分类哈希开始):
sorted = my_hash.inject({}) do |h, (k, v)|
h[k] = Hash[v.sort_by { |k1, v1| v1[:order] }]
h
end
#=> {:category_1=>{:solution_1=>{:order=>2}, :solution_2=>{:order=>3}}, :category_2=>{:solution_4=>{:order=>1}, :solution_3=>{:order=>4}}}