Golang structs
Package structs implements simple functions to manipulate structs in Golang.
Get it
go get github.com/PumpkinSeed/structs
Contains
Contains reports whether value is within struct
package main
import "github.com/PumpkinSeed/structs"
type Tst struct {
TestString string
TestFloat32 float32
TestFloat64 float64
}
func main() {
tst := Tst{
TestString: "test",
TestFloat32: 13.444,
TestFloat64: 16.444,
}
result := structs.Contains(tst, float64(16.444)) // true
result = structs.Contains(tst, float32(13.444)) // true
}
Benchmark
BenchmarkContains-4 3000000 492 ns/op
Compare
Compare returns a boolean comparing two struct
package main
import "github.com/PumpkinSeed/structs"
type TstA struct {
TestInt int
TestInt8 int8
TestInt16 int16
}
type TstB struct {
TestInt int
TestInt8 int8
TestInt16 int16
}
func main() {
tstA := TstA{
TestInt: 12,
TestInt8: 42,
TestInt16: 55,
}
tstB := TstB{
TestInt: 12,
TestInt8: 42,
TestInt16: 55,
}
result := structs.Compare(testStructA, testStructB) // true
}
Benchmark
BenchmarkCompareEqual-4 5000000 379 ns/op
BenchmarkCompareNotEqual-4 5000000 372 ns/op
Index
Index returns the index of the first instance of the value in struct
package main
import "github.com/PumpkinSeed/structs"
type Tst struct {
TestInt int
TestInt8 int8
TestInt16 int16
TestInt32 int32
TestInt64 int64
TestString string
TestBool bool
TestFloat32 float32
TestFloat64 float64
}
func main() {
tst := Tst{
TestInt: 12,
TestInt8: 42,
TestInt16: 55,
TestInt32: 33,
TestInt64: 78,
TestString: "test",
TestBool: false,
TestFloat32: 13.444,
TestFloat64: 16.444,
}
result := structs.Index(testStruct, "test") // 5
}
Benchmark
BenchmarkIndex-4 5000000 242 ns/op
FieldNameByValue
FieldNameByValue returns the field's name of the first instance of the value in struct
package main
import "github.com/PumpkinSeed/structs"
type Tst struct {
TestInt int
TestInt8 int8
TestInt16 int16
TestInt32 int32
TestInt64 int64
TestString string
TestBool bool
TestFloat32 float32
TestFloat64 float64
}
func main() {
tst := Tst{
TestInt: 12,
TestInt8: 42,
TestInt16: 55,
TestInt32: 33,
TestInt64: 78,
TestString: "test",
TestBool: false,
TestFloat32: 13.444,
TestFloat64: 16.444,
}
result := structs.FieldNameByValue(testStruct, "test") // TestString
}
Benchmark
BenchmarkFieldNameByValue-4 5000000 293 ns/op
Map
The second parameter is a function, apply the function on each field on the struct, or on the condition determined in the third argument
package main
import "github.com/PumpkinSeed/structs"
type Tst struct {
Username string
Title string
Content string
}
func main() {
tst := Tst{
Username: "PumpkinSeed",
Title: "Test title",
Content: "Test content",
}
result, err := structs.Map(&ts, func(v reflect.Value) error {
if v.Type() == stringType {
v.SetString(strings.ToLower(v.String()))
}
return nil
})
}
Benchmark
BenchmarkMap-4 5000000 268 ns/op
Replace
Replace returns a copy of the struct with the first non-overlapping instance of old replaced by new, the last param (n) is the limit, if n < 0, there is no limit on the number of replacements
package main
import "github.com/PumpkinSeed/structs"
type Tst struct {
TestInt int
TestInt8 int8
TestInt16 int16
TestInt32 int32
TestInt64 int64
TestString1 string
TestString2 string
TestString3 string
TestString4 string
TestBool bool
TestFloat32 float32
TestFloat64 float64
}
func main() {
tst := Tst{
TestInt: 12,
TestInt8: 42,
TestInt16: 55,
TestInt32: 33,
TestInt64: 78,
TestString1: "test",
TestString2: "test",
TestString3: "test",
TestString4: "test",
TestBool: false,
TestFloat32: 13.444,
TestFloat64: 16.444,
}
result, err := structs.Replace(&ts, "test", "new", 2)
}
Benchmark
BenchmarkReplace-4 2000000 655 ns/op
ToDo
- Upgrade GoDoc
- Implement Map