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> X == Y: !(X < Y) && !(Y > X) Only for totally ordered sets [1]. Floating-point numbers, for example, are not totally ordered, because !(NaN == NaN). [1] htt

by adwn 9y ago

> X == Y: !(X < Y) && !(Y > X) Only for totally ordered sets [1]. Floating-point numbers, for example, are not totally ordered, because !(NaN == NaN). [1] https://en.wikipedia.org/wiki/Total_order https://en.wikipedia.org/wiki/Total_order