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How do I have Ruby YAML dump a Hash subclass as a simple Hash?


How do I have Ruby YAML dump a Hash subclass as a simple Hash?

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How do I have Ruby YAML dump a Hash subclass as a simple Hash?
Tag : ruby , By : jgood
Date : November 25 2020, 07:06 PM


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How to modify Hash to enable access of element 'hash[:a][:b]' by shorter 'hash[:a,:b]' in Ruby?


Tag : ruby , By : Myatus
Date : March 29 2020, 07:55 AM
it helps some times I would be happy to access any element of multi-dimensional hash-array by a shorter expression , I have fixed my code, so now it works
class AutoHash < Hash
  def initialize *args
    super
    @update, @update_index = args[0][:update], args[0][:update_key] unless 
args.empty?
  end

    def [] key,*args
      if args.count > 0
        self[key][*args]
      else
        if self.has_key? key
          super key
        else
          AutoHash.new :update => self, :update_key => key
        end
      end
    end

    def []= *args
      v = args.pop
      k = args.shift
      if args.count > 0
        self[k][*args]= v
      else
        @update[@update_index] = self if @update and @update_index
        super k,v
      end
    end
end
a = AutoHash.new
a[:a][:b][:c] = 123
a[:a,:b,:c] = 321
p a # => {:a=>{:b=>{:c=>321}}}
h[:a][:b][:c] = 123
p h.path(:a,:b,:c) # => 123

h.path(:a,:b,:c)= 321
p h #=> {:a=>{:b=>{:c=>321}}}

mypath = [:a,:b,:c]
p h.path(mypath) #=> 321

Inserting values into a Hash for YAML dump


Tag : ruby , By : Lior
Date : March 29 2020, 07:55 AM
Hope that helps I'm creating a hash that will eventually be dumped on disk in YAML, but I need to capture multiple values stored in a file on disk and insert them into a hash. I can successfully create a variable with comma separated values, but I need to insert those values into a my "classes" key: , You'd probably want something like:
test_hash = {'Classes' => variable_values.split(',')}

Ruby: How to populate subclass of Hash from Hash


Tag : ruby , By : cameron
Date : March 29 2020, 07:55 AM
Any of those help The cleanest, in my experience, is to leave the initializer alone and to rely the class' [] operator:
>> class SubHash < Hash; end
=> nil

>> a = Hash[{:a => :b}]
=> {:a=>:b}

>> a.class
=> Hash

>> b = SubHash[{:a => :b}]
=> {:a=>:b}

>> b.class
=> SubHash

For a hash of objects in ruby, hash.keys.index(obj) works but hash.has_key?(obj) does not. Why?


Tag : ruby-on-rails , By : user165871
Date : March 29 2020, 07:55 AM
hope this fix your issue First, this drove me nuts. What you're doing looked absolutely correct to me, and, as you already know, doesn't work.
I can take you part of the way to a solution:
def hash
    1
end

dump hash values to yaml file sequentially in perl


Tag : perl , By : user179863
Date : March 29 2020, 07:55 AM
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