Closed it512 closed 1 week ago
If it doesn't exsit, adding Compare()
or maybe Equal()
as a method to the UUID type might be interesting too like:
if myuuid.Equal(theiruuid) {
// do stuff
}
@ayang64 For equality it just is myuuid == theiruuid
. Making UUIDs be comparable for equality is actually the reason that github.com/google/uuid
was forked from github.com/pborman/uuid
. The latter has now been rewritten to be a wrapper around the former. The former represents a UUID as an array while that latter (original) used a slice.
A Compare
function (as in strings
and bytes
) would aid in ordering UUIDs.
@it512 Is there motivation for Compare
beyond that it exists in strings
and bytes
?
@pborman - d'oh! thank you. i didn't consider that while i was typing.
sort and search for exp.
package main
import (
"bytes"
"log"
"slices"
"github.com/google/uuid"
)
func Compare(a, b uuid.UUID) int {
return bytes.Compare(a[:], b[:])
}
var uuids = []uuid.UUID{uuid.Max, uuid.Nil, uuid.New(), uuid.New()}
func main() {
slices.SortFunc(uuids, Compare)
log.Println(uuids)
i, _ := slices.BinarySearchFunc(uuids, uuid.Max, Compare)
log.Println(i)
log.Println(uuids[i])
}
output
2024/06/30 22:36:00 [00000000-0000-0000-0000-000000000000 c0ad65fa-53a0-44e6-b605-95b4b83d2481 f9b73b88-da50-480b-acad-f41c820b57c7 ffffffff-ffff-ffff-ffff-ffffffffffff] 2024/06/30 22:36:00 3 2024/06/30 22:36:00 ffffffff-ffff-ffff-ffff-ffffffffffff
uuid is an ordered type, but Array is not supported operation < > recommended to provide a function to support comparison operations
maybe