Thankfully https://www.npmjs.com/package/is-not-zero is free I think? I have no NPM experience apart from wondering why some somewhat modules are not on github anymore...
Damn, in that case I may need to regress to:
“is”
Which just returns true for truthy values and false for falsely values
By checking that the number is equal to its negative?
I think that isFourtyTwo is free.
Oh yeah, Imma do the most Hacker News I can think of and re-impl both packages in Rust. Better yet I might fire up PyTorch and develop some ML solution to recognize even/oddness. There really are more choices for this than I though at first.
And publish some NN solution on public repo like huggingface.co.
If we're going to build any of these we're going to really need to do some testing too. That means we need a suitably reliable generator of numbers known to be positive or negative.