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Checking identity of lists, etc.

• To: mathgroup at yoda.physics.unc.edu
• Subject: Checking identity of lists, etc.
• From: Richard Mercer <richard at rmercer.wright.edu>
• Date: Sat, 28 Aug 1993 15:13:19 -0400

I'm not sure how well this is documented, but I learned a long time  
ago to ALWAYS use === to check identity of expressions, and use ==  
only to test equality of numbers; I have not had any trouble with  
this sort of problem since.

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