- it
- golang：比较版本号大小
package main
import (
"fmt"
"strings"
)
var (
VersionBig
= 1
VersionSmall
= 2
VersionEqual
= 0
)
func compareStrVer(verA
, verB
string) int {
verStrArrA
:= spliteStrByNet(verA
)
verStrArrB
:= spliteStrByNet(verB
)
lenStrA
:= len(verStrArrA
)
lenStrB
:= len(verStrArrB
)
if lenStrA
!= lenStrB
{
panic("")
}
return compareArrStrVers(verStrArrA
, verStrArrB
)
}
func compareArrStrVers(verA
, verB
[]string) int {
for index
, _ := range verA
{
littleResult
:= compareLittleVer(verA
[index
], verB
[index
])
if littleResult
!= VersionEqual
{
return littleResult
}
}
return VersionEqual
}
func compareLittleVer(verA
, verB
string) int {
bytesA
:= []byte(verA
)
bytesB
:= []byte(verB
)
lenA
:= len(bytesA
)
lenB
:= len(bytesB
)
if lenA
> lenB
{
return VersionBig
}
if lenA
< lenB
{
return VersionSmall
}
return compareByBytes(bytesA
, bytesB
)
}
func compareByBytes(verA
, verB
[]byte) int {
for index
, _ := range verA
{
if verA
[index
] > verB
[index
] {
return VersionBig
}
if verA
[index
] < verB
[index
] {
return VersionSmall
}
}
return VersionEqual
}
func spliteStrByNet(strV
string) []string {
return strings
.Split(strV
, ".")
}
func main() {
versionA
:= "1.2.3.54"
versionB
:= "1.2.3.54"
fmt
.Println(compareStrVer(versionA
, versionB
))
}
