> An exception is the same NaN, only less convenientlying packaged.
I prefer an exception because I'd rather have my code fail fast, and immediately point me close to the source of the bug, rather than letting a NaN or Infinity propagate through my code base and cause some harder-to-debug problems down the line.
That's the main thing I don't like about JavaScript. 1/0 is Infinity, Math.acos(2) is NaN, Object().foo is undefined, etc. I find myself wasting a lot of debugging time just figuring out where those (usually expected) values came from originally.
I prefer an exception because I'd rather have my code fail fast, and immediately point me close to the source of the bug, rather than letting a NaN or Infinity propagate through my code base and cause some harder-to-debug problems down the line.
That's the main thing I don't like about JavaScript. 1/0 is Infinity, Math.acos(2) is NaN, Object().foo is undefined, etc. I find myself wasting a lot of debugging time just figuring out where those (usually expected) values came from originally.