根据 YAML 文档,可以将选项哈希传递给该.to_yaml
方法。
目前,当我按照文档的建议传递选项时,它不起作用,哈希被忽略。
irb(main):001:0> require 'yaml'
=> true
irb(main):002:0> user = { "1" => { "name" => "john", "age" => 44 } }
user.to_yaml
=> "--- \n\"1\": \n name: john\n age: 44\n"
现在,传递一些选项:
irb(main):014:0> user.to_yaml( :Indent => 4, :UseHeader => true, :UseVersion => true )
=> "--- \n\"1\": \n name: john\n age: 44\n"
irb(main):015:0> user.to_yaml( :Separator => "\n" )
=> "--- \n\"1\": \n name: john\n age: 44\n"
irb(main):016:0> user.to_yaml( :separator => "\n" )
=> "--- \n\"1\": \n name: john\n age: 44\n"
irb(main):017:0> RUBY_VERSION
=> "1.9.1"
如您所见,传递选项不起作用。只有默认值:
YAML::DEFAULTS
=> {:Indent=>2, :UseHeader=>false, :UseVersion=>false, :Version=>"1.0", :SortKeys=>false, :AnchorFormat=>"id%03d", :ExplicitTypes=>false, :WidthType=>"absolute", :BestWidth=>80, :UseBlock=>false, :UseFold=>false, :Encoding=>:None}
这是一个已知的错误?或者它目前适用于使用 Ruby 1.9.1 的任何人?