jsonrubyextractcollect

Modifying a json structure file with ruby

I tried with map and flat.map to restructure a json file (here is a sample it), with ruby from:

a= {
    "_nb": {
        "$nb": "55dd0"
    },
    "conf": "linux"
}

to

{
    "_nb": "55dd0",
    "conf": "linux"
}

or

{
    "$nb": "55dd0",
    "conf": "linux"
}

Could anyone point me in the right direction, please?

NOTE: So far I add this solution implemented which returns a NoMethodError.. Hope this will help you both user1934428 & Cary Swoveland ..


    File.open("src.json", "w") do |f|  
          hash_data = JSON.parse(File.read(a))
          hash = hash_data.to_s
          hash.each do |key, value|
            if key == "_id"
              hash[value] = value.values.first
            end
          end
          f.puts(hash)
          end
Solution

  • A first step might be:

    hash = {
  "_nb": {
    "$nb": "55dd0"
  },
  "conf": "linux"
}

hash.transform_values { |value| value.is_a?(Hash) ? value.values.first : value }
#=> {:_nb=>"55dd0", :conf=>"linux"}

    Note: This only works when the nesting is not deeper than one level and when the nested array has only one key/value pair.