package main import ( "fmt" ) func Hash(key uint64, buckets int32) int32 { var b, j int64 if buckets <= 0 { buckets = 1 } for j < int64(buckets) { b = j key = key*2862933555777941757 + 1 j = int64(float64(b+1) * (float64(int64(1)<<31) / float64((key>>33)+1))) } return int32(b) } func main() { var m map[int32]int m = make(map[int32]int) for i := 0; i < 10000; i++ { node := Hash(uint64(i), int32(10)) m[node]++ } for k, v := range m { fmt.Println(k, ":", v) } }
package main import "fmt" import "encoding/json" type myType []map[string]interface{} func main() { msg := "[{\"assets\" : 1, \"address\":\"Seoul\"}, {\"assets\":2}]" var data myType err := json.Unmarshal([]byte(msg), &data) if err != nil { println(err) return } for _, value := range data { fmt.Println(value["assets"]) } mystr, _ := json.Marshal(data) fmt.Println(string(mystr)) }
package main import ( "math/rand" "fmt" "time" ) var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") func Init() { rand.Seed(time.Now().UnixNano()) } func RandStringRunes(n int) string { b := make([]rune, n) for i := range b { b[i] = letterRunes[rand.Intn(len(letterRunes))] } return string(b) } func main() { Init() fmt.Println(RandStringRunes(16)) }
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Jump Consistent Hash
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