Module: Useful::RubyExtensions::Hash::ClassMethods

Defined in:
lib/useful/ruby_extensions/hash.rb

Instance Method Summary collapse

Instance Method Details

#except(hash, *keys) ⇒ Object

Return the hash with only keys NOT in *keys



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# File 'lib/useful/ruby_extensions/hash.rb', line 23

def except(hash, *keys)
  s_keys = keys.flatten.collect{|k| k.to_s}
  hash.delete_if{ |k,v| keys.flatten.include?(k) || s_keys.include?(k) }
  hash
end

#from_json(string) ⇒ Object 



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# File 'lib/useful/ruby_extensions/hash.rb', line 11

def from_json(string)
  JSON.parse(string)
end

#nillify(hash) ⇒ Object

takes any empty values and makes them nil



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# File 'lib/useful/ruby_extensions/hash.rb', line 30

def nillify(hash)
  hash.each do |key,value|
    if !value.nil? && ( (value.respond_to?('empty?') && value.empty?) || (value.respond_to?('to_s') && value.to_s.empty?) )
      hash[key] = nil
    end
  end
  hash
end

#only(hash, *keys) ⇒ Object

Return the hash with only keys in *keys



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# File 'lib/useful/ruby_extensions/hash.rb', line 16

def only(hash, *keys)
  s_keys = keys.flatten.collect{|k| k.to_s}
  hash.delete_if{ |k,v| !keys.flatten.include?(k) && !s_keys.include?(k) }
  hash
end