Comparing IEEE floats and doubles for equality

Question

What is the best method for comparing IEEE floats and doubles for equality? I have heard of several methods, but I wanted to see what the community thought.

Answer 1

it's the best way to do it that I've come across, insofar as it provides the most robust comparisons even in the face of floating point errors.

If you have floating point errors you have even more problems than this. Although I guess that is up to personal perspective.