throw error code use &&

[comxtohr]

throw error code here uses &&：
if (currentP[0] !== contour[contourLen][0] && currentP[1] !== contour[contourLen][1])
so the code throw error only if both lat not equal and lon not equal?

here is code reference:
https://github.com/rowanwins/point-in-polygon-hao/blob/9cee0e8736917d8a8206ece35267fcd4206b9a39/src/index.js#LL23C9-L26C10

[rowanwins]

Yes that check could be improved