Crystal in Production: Diploid

Re:Crystal in Production: Diploid by werdnapk on Saturday October 28, 2017 @08:15PM (#15577378)

Ruby has new syntax to handle calling methods on null objects.

obj&.is&.nil? can replace the use of try obj.try(:is).try(:nil?)

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Re:Crystal in Production: Diploid by rubyfan on Saturday October 28, 2017 @09:01PM (#15577528)

Agree, love this syntax

  obj = nil
  obj&.gsub("f","g") # => nil 
  obj = "food"
  obj&.gsub("f","g") # => "good"

Unfortunately this is not likely second nature and will continue to bite us, especially where our expectations about AR models are not well thought out. A wrapping class for nillables might force safe access of AR attributes.

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