photo mosaic blog 4

.go

// find the nearest matching image
func nearest(target [3]float64, db *map[string][3]float64) string {
    var filename string
    smallest := 1000000.0
    for k, v := range *db {
        dist := distance(target, v)
        if dist < smallest {
            filename, smallest = k, dist
        }
    }
    delete(*db, filename)
    return filename
}