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Jacke/rewrite_hash.rb

Created March 13, 2013 11:26
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If in old hash exist record, then in new nil value can be accepted, otherwise if not nil it would be rejected
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rewrite_hash.rb
hash_old = {"a"=>100, "b"=>""}
Hash["a", "", "", ""].reject { |k,v| v.blank? if hash_old[k].blank? }
# => {"a"=>""}
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