Ruby 2 / Rails 3中有一种简单的方法可以改变它:
{a: {b: {"1" => 1, "2" => 2}, d: "Something"}, b: {c: 1}}
进入这个:
{"a.b.1" => 1, "a.b.2" => 2, "a.d" => "Something", "b.c" => 1}
我不是在谈论这个精确的哈希,而是将任何哈希转换为点符号哈希。
答案 0 :(得分:9)
这是我现在能想出的最干净的解决方案:
def dot_it(object, prefix = nil)
if object.is_a? Hash
object.map do |key, value|
if prefix
dot_it value, "#{prefix}.#{key}"
else
dot_it value, "#{key}"
end
end.reduce(&:merge)
else
{prefix => object}
end
end
测试:
input = {a: {b: {"1" => 1, "2" => 2}, d: "Something"}, b: {c: 1}}
p dot_it input
输出:
{"a.b.1"=>1, "a.b.2"=>2, "a.d"=>"Something", "b.c"=>1}