Module: ActiveTools::CoreExtension::Hashup::ArrayExtension

Defined in:
lib/active_tools/core_extension/hashup.rb

Instance Method Summary collapse

Instance Method Details

#hashup ⇒ Object

Return a nested Hash object from Array’s elements sequence, where elements used as names of hash keys. The last element of array would be the last nested value.

Example:

[:vehicle, :car, :ford, :mustang, "2 please"].hashup

#=> {:vehicle=>{:car=>{:ford=>{:mustang=>"2 please"}}}}

Raises:

  • (Exception) 


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# File 'lib/active_tools/core_extension/hashup.rb', line 14

def hashup
  raise(Exception, "At least 2 elements needed!") if size < 2
  value = delete_at(-1)
  {}.tap do |hash|
    index = 0
    while index < size
      hash = hash[at(index)] = (index + 1 == size) ? value : {}
      index += 1
    end
  end
end