Remove hash from an array of hash that contains specific keys

Question

I have this hash :

{ "car": [
  { "key": 'removeMe1', "name": 'ok' },
  { "key": 'dontRemoveMe1', "surname": 'ok' },
  { "key": 'dontRemoveMe2',
    "array": [
      { "trucks": [
        { "key": 'removeMe2', "name": 'my_profile_name' }
      ] },
      { "trucks": [
        { "key": 'dontRemoveMe3', "name": '34' },
        { "key": 'removeMe3', "surname": '5324' }
      ]}
  ] }
]}

And I would like to remove hash that contains removeMe*

{ "car": [
  { "key": 'dontRemoveMe1', "surname": 'ok' },
  { "key": 'dontRemoveMe2',
    "array": [
      { "trucks": [
        { "key": 'dontRemoveMe3', "name": '34' }
      ] }
  ] }
]}

I succeed at the first level if I do

my_hash.delete_if { |h| ['removeMe1'].exclude?(h['key']) }

But I don't know how to do it for nested levels.

Answer 1

def delete_by_key(data)
  data.each do |k, v|
    if Array === v
      v.each{ |i| delete_by_key(i) }
      v.delete_if { |i| i[:key] && i[:key]["removeMe"] or i.empty? }
      data.delete(k) if v.empty?
    end
  end
end

The result is following

data = { 
  "car": [
    { "key": 'removeMe1', "name": 'ok' },
    { "key": 'dontRemoveMe1', "surname": 'ok' },
    { "key": 'dontRemoveMe2',
      "array": [
        { "trucks": [
          { "key": 'removeMe2', "name": 'my_profile_name' }
        ] },
        { "trucks": [
          { "key": 'dontRemoveMe3', "name": '34' },
          { "key": 'removeMe3', "surname": '5324' }
        ]}
    ] 
  }
]}

delete_by_key(data)
#=> {:car=>[{:key=>"dontRemoveMe1", :surname=>"ok"}, {:key=>"dontRemoveMe2", :array=>[{:trucks=>[{:key=>"dontRemoveMe3", :name=>"34"}]}]}]}