Ruby中如何将嵌套散列转换成点分隔字符串的代码一行实现？

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要将YAML转换为点分隔的字符串，可以使用Ruby的`yaml`库来解析YAML内容，然后递归地遍历数据结构，将每个键和值转换为点分隔的格式。以下是一个简单的示例：

rubyrequire 'yaml'

def yaml_to_dotSeparated(yaml_str) data=YAML.safe_load(yaml_str) dot_separated(data, '')end

def dot_separated(data, prefix='') case data when Hash data.map do |key, value| dot_separated(value, #{prefix}#{key}.) end.join when Array data.map { |item| dot_separated(item, prefix) }.join else #{prefix}#{data} endend

示例YAML字符串yaml_str=<<-YAMLname: John Doeage: 30children: - name: Jane Doe age: 10YAML

转换YAML到点分隔的字符串puts yaml_to_dotSeparated(yaml_str)

这段代码首先定义了一个`yaml_to_dotSeparated`方法，它使用`YAML.safe_load`来解析YAML字符串。然后，它调用`dot_separated`方法来递归地将数据转换为点分隔的字符串。`dot_separated`方法根据数据类型（哈希、数组或值）来决定如何格式化输出。

WhatsthesimplestmethodtoconvertYAMLtodot-separatedstringsinRuby?在Ruby中，将YAML转换为点分隔字符串的最

What's the simplest method to convert YAML to dot-separated strings in Ruby?

在Ruby中，将YAML转换为点分隔字符串的最简单方法是什么?

So this:

所以这个:

root: child_a: Hello child_b: nested_child_a: Nesting nested_child_b: Nesting Again child_c: K

To this:

:

{ "ROOT.CHILD_A" => "Hello", "ROOT.CHILD_B.NESTED_CHILD_A" => "Nesting", "ROOT.CHILD_B.NESTED_CHILD_B" => "Nesting Again", "ROOT.CHILD_C" => "K"}

1 个解决方案

#1

12

It's not a one-liner, but perhaps it will fit your needs

这不是一句俏皮话，但也许它会适合你的需要

def to_dotted_hash(source, target = {}, namespace = nil) prefix = "#{namespace}." if namespace case source when Hash source.each do |key, value| to_dotted_hash(value, target, "#{prefix}#{key}") end when Array source.each_with_index do |value, index| to_dotted_hash(value, target, "#{prefix}#{index}") end else target[namespace] = source end targetendrequire 'pp'require 'yaml'data = YAML.load(DATA)pp datapp to_dotted_hash(data)__END__root: child_a: Hello child_b: nested_child_a: Nesting nested_child_b: Nesting Again child_c: K

prints

打印

{"root"=> {"child_a"=>"Hello", "child_b"=>{"nested_child_a"=>"Nesting", "nested_child_b"=>"Nesting Again"}, "child_c"=>"K"}} {"root.child_c"=>"K", "root.child_b.nested_child_a"=>"Nesting", "root.child_b.nested_child_b"=>"Nesting Again", "root.child_a"=>"Hello"}