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A comment on The switch: Python to Node.js. Parent comment

Re:The switch: Python to Node.js by sneak on Monday December 19, 2011 @10:57AM (#3369976)
I have never once used the 'is' keyword in python.
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Re:The switch: Python to Node.js by dtf on Monday December 19, 2011 @03:50PM (#3371084)
Have you ever tested for a None value?

    if foo is None:
      return

    if bar is not None:
      bar()
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