I would like to implement a generic sample function for arrays in V. The inspiration for this is base::sample() in R.
A very basic prototype without the replace and prob options of the R function and limited to integer arrays could look like this:
pub fn sample_int(arr[] int, size int) []int {
mut res := [0].repeat(size)
for i := 0; i < size; i++ {
res[i] = arr[rand.next(arr.len)]
}
return res
}
Is it possible at the moment to make this function generic to work with all kinds of arrays? How would I implement this?
There is a section about generics in the V documentation, but I was not able to figure it out with this example code. I also searched for examples in the V repo, but I only found ToDo comments where generics are supposed to be implemented in the future.
The docs are very outdated with the progress of V. Here is the code of how to use generics in V with your function. Also join the discord server for discussions and more talks.
pub fn sample_int<T>(arr[] T, size int) []T {
mut res := [arr[1]].repeat(size)
for i := 0; i < size; i++ {
res[i] = arr[rand.next(arr.len)]
}
return res
}