govert is a no-dependancy packagheprovides you some helpers to convert golang basic data types specially interfaces to any another basic type.
$ go get github.com/mdaliyan/govertimport govert as following, then you have 2 ways to use it.
import to "github.com/mdaliyan/govert"package main
import to "github.com/mdaliyan/govert"
import "fmt"
func main() {
var i interface{} = 3783.2882332
// interface to string
aString := to.String(i, 3) // "3783.288"
// float64 to string
anotherString := to.String(3783.2882332, 3) // "3783.288"
// bool to string
aTrueString := to.String(true) // "true"
aFalseString := to.String(false) // "false"
// bool to int8
aTrueInt8 := to.Int8(true) // 1
aFalseInt8 := to.Int8(false) // 0
// string to float64
aFloat32 := to.Float32("3783.2882332") // 3783.2883
// string to int8
anInt8 := to.Int8("56") // 56
fmt.Println(aString, anotherString, aTrueString, aFalseString, aTrueInt8, aFalseInt8, aFloat32, anInt8)
// 3783.288 3783.288 true false 1 0 3783.2883 56
}package main
import to "github.com/mdaliyan/govert"
import "fmt"
func main() {
var err error
// string to float64
var aFloat float64
err = to.This("3783.2882332", &aFloat) // 3783.2882332
// string to int64
var anInt64 int64
err = to.This("3783.2882332", &anInt64) // 3783
// float64 to int32
var anInt32 int32
err = to.This(3783.2882332, &anInt32) // 3783
// float64 to string
var String1, String2, String3 string
err = to.This(3783.2882332, &String1) // "3783.2882", 4 percs by default
err = to.This(3783.2882332, &String2, 3) // "3783.288"
err = to.This(3783.2882332, &String3, 2) // "3783.29"
fmt.Println(err, aFloat, anInt64, anInt32, String1, String2, String3)
// <nil> 3783.2882332 3783 3783 3783.2882 3783.288 3783.29
}- Support converting from complex type to other types. (At this point I'm thinking of just removing imaginary part.)
- Adding benchmarks
govert uses reflection to detect data types so it may not be what you want if you have so many ops and you need code performance to be high. Otherwise it’s ok for simple use cases, build prototypes or learning purpose.
Converting numbers like int, in16, int32, in64, float32, float64, uint, uint, uint16, uint32, uint64 to each other with govert is totally non-optimal. Just convert them like this.
var a float32 = 331.23
var b int64 = int64(a)If you have an interface and you have to check type before converting it, or you are trying to convert something to string or vice versa, using govert makes sense.
| Converting | govert | regular way | compare | |||||
|---|---|---|---|---|---|---|---|---|
| From | To | ns/op | B/op | allocs/op | ns/op | B/op | allocs/op | times slower |
| int (interface) | string | 200 | 51 | 4 | 63.1 | 19 | 2 | x3.2 |
| int (interface) | float64 | 119 | 24 | 3 | 22.0 | 8 | 1 | x5.4 |
| int | string | 216 | 64 | 5 | 59.6 | 19 | 2 | x11.6 |
| int | float64 | 219 | 64 | 5 | 18.6 | 8 | 1 | x12 |
| string (interface) | int | 149 | 24 | 3 | 75 | 48 | 1 | x2 |
| string (interface) | float64 | 150 | 24 | 3 | 45.3 | 8 | 1 | x3.3 |
| string | int | 185 | 40 | 4 | 71.5 | 48 | 1 | x2.6 |
| string | float64 | 186 | 40 | 4 | 40.6 | 8 | 1 | x4.5 |
Feel free to send PR.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent