I'm looking to get some ideas from the community about a particular issue that I often face and would love to settle on an answer to. An example of the more general issue I'm referring to is when a unit test fails because
12.000000001 is not equal to
12.0. These tiny discrepancies seem to often get introduced when working with
Double. I believe that converting to and from
Data is a common cause.
One of the possible holistic answers to this issue that I'm toying with is the possibility that actually comparing two doubles for exact equality is generally ill-advised. Maybe the issue is that exact equality is a more relevant question to ask for discrete values, whereas continuous values shine in contexts where greater-than/less-than comparison is what's needed.
I was just in the middle of writing a unit test which failed for this reason and that was sufficient motivation for me to write to the community to ask for advice. What do you think?