Module: Wrest::CoreExt::Hash::Conversions

Included in:
Hash
Defined in:
lib/wrest/core_ext/hash/conversions.rb

Overview

Makes it easier to build other objects from a Hash

Instance Method Summary collapse

Instance Method Details

#mutate_using(mutator) ⇒ Object

This method accepts a hash mutator (found in Wrest::Compononents) to build a new hash map by making changes to an existing one.

No, this method does not mutate the state of the hash it is invoked on, but rather builds a new one.

Yes, the name is misleading in that respect. However, one hopes the absence of an exclamation mark will increase clarity.

Uses include mutating the hash produced by xml-simple by using the meta data in the hash to type cast values.

Example: "http://search.yahooapis.com/NewsSearchService/V1/newsSearch".to_uri.get( :appid => 'YahooDemo', :output => 'xml', :query => 'India', :results=> '3', :start => '1' ).deserialise.mutate_using(XmlSimpleTypeCaster.new)



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# File 'lib/wrest/core_ext/hash/conversions.rb', line 36

def mutate_using(mutator)
  returning({})do |mutated_hash|
    self.each{|tuple| mutated_hash.store(*mutator.mutate(tuple))}
  end
end