Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/threetaps_client/core_ext/hash.rb

Instance Method Summary collapse

Instance Method Details

#flatten(prefix = nil) ⇒ Object

Returns a “flatten” hash representation of the receiver:

{ :source => 'CRAIG', :location => { :country => 'USA' } }.flatten
# => { :source => 'CRAIG', :"location.country" => 'USA' }

{ :param => 1, :nested => { :param => 2, :nested => { :param => 2 } } }.flatten
# => { :param => 1, :"nested.param" => 2, :"nested.nested.param" => 2}

An optional prefix can be passed to enclose the key names:

{ :country => 'USA', :state => 'CA' }.flatten('location')
# => { :"location.country" => 'USA', :"location.state" => 'CA' }



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# File 'lib/threetaps_client/core_ext/hash.rb', line 14

def flatten(prefix=nil)
  prefix = "#{prefix}." if prefix
  inject({}) do |hash, (key, value)|
    if value.is_a?(Hash)
      hash.merge! value.flatten("#{prefix}#{key}")
    else
      hash[:"#{prefix}#{key}"] = value
    end
    hash
  end
end