Looks like F# but has a big design mistake in my opinion (which F# doesn't): the symbol '=' in a functional programming should be tied to comparison, not assign

Looks like F# but has a big design mistake in my opinion (which F# doesn't): the symbol '=' in a functional programming should be tied to comparison, not assignment. (The approach taken here is using "==" for comparison, which is less ugly than JavaScript's "===" but still ugly.)