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codeslinger/hash_filter.rb

Forked from r38y/hash_filter.rb
Created December 23, 2009 19:24
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hash_filter.rb
require 'yaml'
class Hash
def filter(*keys)
self.inject({}) {|h,(k,v)| h[k] = v if keys.include?(k); h}
end
end
test_hash = {'one' => 1, 'two' => 2, 'three' => 3}
puts test_hash.to_yaml
puts test_hash.filter('one').to_yaml
puts test_hash.filter('one', 'two').to_yaml
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