A modern programming language that makes developers happier.

kotlinlang

image.png

I was looking at the generated JS code and noticed there are a lot of `| 0` , especially when incrementing numbers in loops.
What's the theory behind that?

For reference, the Kotlin code is:
```for (c in this) { // this is a String
  val code = c.code
  ...
}```


It tells the VM that it's an integer and not a floating-point value

It's been around forever, but it gained huge traction with tooling that produces JS as a result of asm.js <https://en.wikipedia.org/wiki/Asm.js>

Oh cool! Thanks.
So it's mostly used by code generation tools? (asking because I've never seen it used in code written by a human, at least not for TypeScript stuff)

Unless you were optimizing for extreme performance, a human would be unlikely to write such code.

Also, in typescript there is no difference between integer and floating-point numbers, so, they don't add anything like this.
You could also notice that for integer multiplication we use `Math.imul` instead of the regular `*`