Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/core.rb,
lib/pdf/core.rb,
lib/pdf/core.rb

Instance Method Summary collapse

Instance Method Details

#assert_valid_keys(*valid_keys) ⇒ Object

raise an error if this hash has any keys that aren’t in the supplied list

  • borrowed from activesupport

Raises:

  • (ArgumentError) 


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# File 'lib/pdf/core.rb', line 8

def assert_valid_keys(*valid_keys)
  unknown_keys = keys - [valid_keys].flatten
  raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty?
end

#except(*keys) ⇒ Object 



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# File 'lib/pdf/core.rb', line 18

def except(*keys)
  keys.flatten!
  self.dup.reject { |k,v|
    keys.include? k.to_sym
  }
end

#only(*keys) ⇒ Object 



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# File 'lib/pdf/core.rb', line 31

def only(*keys)
  keys.flatten!
  self.dup.reject { |k,v|
    !keys.include? k.to_sym
  }
end