Why isn't the `Number` interface extending `Compa...

# language-proposals

[holgerbrandl]

Why isn't the Number interface extending Comparable ? Being a number always superimposes an ordering imho.

[louiscad]

Because of NaN?

[holgerbrandl]

I see the argument, but in fact Double is implemented as Double private constructor() : Number(), Comparable<Double> in the standard library, which somehow argues against it. AFAIK all other subtypes of Number (excluding Double and Flot) don't have a NaN value

[louiscad]

You're right. I guess it's because Java's Number doesn't either? Regardless, it's pretty easy to make your own comparator that does a conversion beforehand.

[Fleshgrinder]

The number interface is generally useless.

[Ben Woodworth]

Also keep in mind that not all sets of numbers are ordered, such as complex numbers