go 基本类型的互转
2021-03-15 tech go 3 mins 1319 字
转转转，类型转换是静态语言（强类型语言）在代码时候经常要进行的动作。这篇文章是我 golang 开发中类型转换的一些笔记。interface、struct、map相关的转换参考前文《golang 解析 map[string]interface{} 和 json 到 struct》
package xxx
import (
"strconv"
)
int -> string
// int64
var Int64 int64 = 9223372036854775807
str := strconv.FormatInt(Int64, 10)
// unit64
var Uint64 uint64 = 18446744073709551615
str2 := strconv.FormatUint(Uint64, 10)
// int32
var test int32 = xxx
str3 := strconv.Itoa(int(test))
// int32
// 对比: <https://stackoverflow.com/questions/39442167/convert-int32-to-string-in-golang>
s = String(i) takes: 5.5923198s
s = String2(i) takes: 5.5923199s
s = strconv.FormatInt(int64(i), 10) takes: 5.9133382s
s = strconv.Itoa(int(i)) takes: 5.9763418s
s = fmt.Sprint(i) takes: 13.5697761s
string -> int
// int64
var strInt64 string = "9223372036854775807"
convertedStrInt64, _ := strconv.ParseInt(strInt64, 10, 64)
// uint64
var strUint64 string = "18446744073709551615"
convertedStrUint64, _ := strconv.ParseUint(strUint64, 10, 64)
interface -> map[string] interface
// data 为 interface
data.(map[string]interface{})
interface -> string
// data 为 interface
data.(string)
string->[]byte
var str string = "test"
data := []byte(str)
[]byte->string
var data [10]byte
string := string(data)