Operator Overloading for Arrays or how to make Vector Calculations?

[toihr]

I am very interested as a scientist to use the V Language because of the simplicity and ease of writing while still generating highly optimizable code that can run on everything through the use of C as an IR.

There is just one thing that I havent quite been able to figure out. The Documentation mentions that Operator overloading exists mainly for the Science Domains that should be supported. So I was trying to use operator overloading to create a simple way to do Vector Addition (Element Wise array addition). I know I could just make a loop instead but thats just in general less readable.

So far i tried to do it as follows:

(a1 []int) + (a2 []int) []int{
   result := []int{len: a1.len, init: 0}
   for i in 0 .. a1.len{
      result[i] = a1[i] + a2[i]
   }
   return result
}

But this does not seem to work is there a way to do this if anyone knows something good here it would be greatly appreciated.

[Delta456]

You would have to make an alias for the int slice.

type Slice = []int

(a1 Slice) + (a2 Slice) Slice {
   result := Slice([]int{len: a1.len, init: 0})
   for i in 0 .. a1.len{
      result[i] = a1[i] + a2[i]
   }
   return result
}

[JalonSolov]

for i, _ in a1 {

You don't need to specify starting from 0 and going to length. It is for index, value in array, and _ means the value is ignored for this loop, since you need the index to access the 2nd array.

V also supports iterating the value (without the index) with a simple

for val in a1 {

but that won't give the index to use for the 2nd array.

[toihr]

aye i see how that works now. Its a bit more inconvenient than I would have liked, on the level of using Numpy in python. I had hoped i could overload it directly so I dont have to wrap the arrays i want to use in a slice([1,2,3]) which just makes it a little bit more inconvenient to write.

[LukyGuyLucky]

neither of the above code snippets works.There is something missing.