2D slices example from https://go.dev/doc/effective_go

[Dan Ion]

The 2D slices example from https://go.dev/doc/effective_go#two_dimensional_slices is confusing, isn't it?

This is the example:

// Allocate the top-level slice. 

picture := make([][]uint8, YSize) 

// One row per unit of y. 

// Loop over the rows, allocating the slice for each row. 

for i := range picture {

    picture[i] = make([]uint8, XSize)

}

This implementation assumes that we access one element by (y, x) pair, which is confusing. That's because the pair is (x, y).

Am I wrong here?

[Jan Mercl]

See https://en.wikipedia.org/wiki/Row-_and_column-major_order and
which camp C is in.