## mark a section (Learn more)

json.org example string: {"nickname":null,"num":100,"balance":1000.21,"is_vip":true,"name":"foo"} require 'yaml' >> x = YAML::load %{{"nickname": null, "num": 100, "balance": 1000.21, "is_vip": true, "name": "foo"}} => {"name"=>"foo", "nickname"=>nil, "num"=>100, "is_vip"=>true, "balance"=>1000.21} >> x["name"] => "foo" >> x.each_key{|x| p x} "name" "nickname" "num" "is_vip" "balance"

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