parseInt with a non-parsable string it returns
NaN. I’m trying to understand the reasons for designing a parsing function this way.
When I write a parsing function I usually return
null or throw an exception in case the input is not parsable. It seems to me that
NaN is unsafe because it allows the code to keep running even when there is no value to work with.
For example, this will not throw any runtime error:
parseInt('a') + 1
But this could lead to unexpected behavior when you expect something to be an actual number while it’s actually
So my question is: Shouldn’t such a parsing function just return
null or throw an exception, or are there benefits to returning