How to work around Go array sizes in functions

I just started using Go, and one thing that makes me nervous is that if I define a function that accepts an array, and then pass an array to a function with a specific size, VS Code complains about it.

For example, I have something like this:

func cmplt(a, b []uint64) uint64 {
	var r, m, i uint64
	r = 0
	m = 0
	for i = 2; i >= 0; i-- {
		r |= LtUint64(a[i], b[i]) & ^m
		m |= MaskUint64(NeUint64(a[i], b[i]))
	}
	return r & 1
}

And then I call this function inside another function as:

func singleSample(in []uint64) uint64 {
	var i, index uint64
	index = 0
	for i = 0; i < 52; i++ {
		index = SelectUint64(index, i+1, cmplt(in, table[i]))
	}
	return index
}

where table has type [52][3]uint64. I get an error message saying: cannot use table (type [3]uint64) as []uint64 in argument to cmplt.

Is there any way in Go to workaround this, instead of specifically specifying the array size in function parameter?

Your cmplt is expecting a uint64 slice, and not a 3 element array. Taking a slice of table[i] will fix the error:

cmplt(in, table[i][:])

From what I see the best solution is to change your cmplt function definition to accept arrays:

func cmplt(a, b [3]uint64) uint64 {

In your code you any way rely on the size of the underlying array, hence make sure to specify your function dependencies as clear as possible