DEV Community

Discussion on: 8 neat Javascript tricks you didn't know in 4 minutes.

Collapse
 
eecolor profile image
EECOLOR

Ahh yeah, I forgot about the fact that parseInt ignores anything non-numeric after a number.

I would still rather use Number(value) to +value to clarify intent.

Thread Thread
 
gilfewster profile image
Gil Fewster

Yeah, I don’t think I’d use unary plus either, but sometimes a use case presents itself for unexpected things. I certainly didn’t know about it, and now I do, so I’ve learned something.

I think partly the dislike of it comes from its unfamiliarity. We don’t see it in common use very often, whereas the old value * 1 trick for type coercion is scattered throughout the internet. While you could certainly debate the wisdom of that technique, I’d imagine most developers would understand the intent immediately when they see it — largely because it’s an old and well-known shortcut. But on the face of it, multiplying something by 1 could seem a pretty pointless thing to do.

This is all a great example of the fact that what we think of as intuitive as often really just what we learned through repetition and convention.

Some comments have been hidden by the post's author - find out more