convertor

package
v0.0.0-...-d1e1ff0 Latest Latest
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 Go to latest Published: May 11, 2023 License: MIT Imports: 11 Imported by: 0

Documentation

Overview

Package convertor implements some functions to convert data.

Package convertor implements some functions to convert data.

Index

Examples

Constants

This section is empty.

Variables

This section is empty.

Functions

func ColorHexToRGB 

func ColorHexToRGB(colorHex string) (red, green, blue int)

ColorHexToRGB convert hex color to rgb color. Play: https://go.dev/play/p/o7_ft-JCJBV

Example 
colorHex := "#003366"
r, g, b := ColorHexToRGB(colorHex)

fmt.Println(r, g, b)

Output:

0 51 102

func ColorRGBToHex 

func ColorRGBToHex(red, green, blue int) string

ColorRGBToHex convert rgb color to hex color. Play: https://go.dev/play/p/nzKS2Ro87J1

Example 
r := 0
g := 51
b := 102
colorHex := ColorRGBToHex(r, g, b)

fmt.Println(colorHex)

Output:

#003366

func CopyProperties 

func CopyProperties[T, U any](dst T, src U) (err error)

CopyProperties copies each field from the source into the destination. It recursively copies struct pointers and interfaces that contain struct pointers. Play: https://go.dev/play/p/FOVY3XJL-6B

Example 
type Address struct {
	Country string
	ZipCode string
}

type User struct {
	Name   string
	Age    int
	Role   string
	Addr   Address
	Hobbys []string
	salary int
}

type Employee struct {
	Name   string
	Age    int
	Role   string
	Addr   Address
	Hobbys []string
	salary int
}

user := User{Name: "user001", Age: 10, Role: "Admin", Addr: Address{Country: "CN", ZipCode: "001"}, Hobbys: []string{"a", "b"}, salary: 1000}

employee1 := Employee{}
err := CopyProperties(&employee1, &user)
if err != nil {
	return
}

employee2 := Employee{Name: "employee001", Age: 20, Role: "User",
	Addr: Address{Country: "UK", ZipCode: "002"}, salary: 500}

err = CopyProperties(&employee2, &user)
if err != nil {
	return
}

fmt.Println(employee1)
fmt.Println(employee2)

Output:

{user001 10 Admin {CN 001} [a b] 0}
{user001 10 Admin {CN 001} [a b] 500}

func DecodeByte 

func DecodeByte(data []byte, target any) error

DecodeByte decode byte slice data to target object. Play: https://go.dev/play/p/zI6xsmuQRbn

Example 
var obj string
byteData := []byte{6, 12, 0, 3, 97, 98, 99}
err := DecodeByte(byteData, &obj)
if err != nil {
	return
}

fmt.Println(obj)

Output:

abc

func DeepClone 

func DeepClone[T any](src T) T

DeepClone creates a deep copy of passed item. can't clone unexported field of struct Play: https://go.dev/play/p/j4DP5dquxnk

Example 
type Struct struct {
	Str   string
	Int   int
	Float float64
	Bool  bool
	Nil   interface{}
	// unexported string
}

cases := []interface{}{
	true,
	1,
	0.1,
	map[string]int{
		"a": 1,
		"b": 2,
	},
	&Struct{
		Str:   "test",
		Int:   1,
		Float: 0.1,
		Bool:  true,
		Nil:   nil,
		// unexported: "can't be cloned",
	},
}

for _, item := range cases {
	cloned := DeepClone(item)

	isPointerEqual := &cloned == &item
	fmt.Println(cloned, isPointerEqual)
}

Output:

true false
1 false
0.1 false
map[a:1 b:2] false
&{test 1 0.1 true <nil>} false

func EncodeByte 

func EncodeByte(data any) ([]byte, error)

EncodeByte encode data to byte slice. Play: https://go.dev/play/p/DVmM1G5JfuP

Example 
byteData, _ := EncodeByte("abc")
fmt.Println(byteData)

Output:

[6 12 0 3 97 98 99]

func MapToSlice 

func MapToSlice[T any, K comparable, V any](aMap map[K]V, iteratee func(K, V) T) []T

MapToSlice convert map to slice based on iteratee function. Play: https://go.dev/play/p/dmX4Ix5V6Wl

Example 
aMap := map[string]int{"a": 1, "b": 2, "c": 3}
result := MapToSlice(aMap, func(key string, value int) string {
	return key + ":" + strconv.Itoa(value)
})

fmt.Println(result) //[]string{"a:1", "c:3", "b:2"} (random order)

Output:

func StructToMap 

func StructToMap(value any) (map[string]any, error)

StructToMap convert struct to map, only convert exported struct field map key is specified same as struct field tag `json` value. Play: https://go.dev/play/p/KYGYJqNUBOI

Example 
type People struct {
	Name string `json:"name"`
	age  int
}
p := People{
	"test",
	100,
}
pm, _ := StructToMap(p)

fmt.Println(pm)

Output:

map[name:test]

func ToBool 

func ToBool(s string) (bool, error)

ToBool convert string to boolean. Play: https://go.dev/play/p/ARht2WnGdIN

Example 
cases := []string{"1", "true", "True", "false", "False", "0", "123", "0.0", "abc"}

for i := 0; i < len(cases); i++ {
	result, _ := ToBool(cases[i])
	fmt.Println(result)
}

Output:

true
true
true
false
false
false
false
false
false

func ToBytes 

func ToBytes(value any) ([]byte, error)

ToBytes convert value to byte slice. Play: https://go.dev/play/p/fAMXYFDvOvr

Example 
result1, _ := ToBytes(1)
result2, _ := ToBytes("abc")
result3, _ := ToBytes(true)

fmt.Println(result1)
fmt.Println(result2)
fmt.Println(result3)

Output:

[0 0 0 0 0 0 0 1]
[97 98 99]
[116 114 117 101]

func ToChannel 

func ToChannel[T any](array []T) <-chan T

ToChannel convert a slice of elements to a read-only channel. Play: https://go.dev/play/p/hOx_oYZbAnL

Example 
ch := ToChannel([]int{1, 2, 3})
result1 := <-ch
result2 := <-ch
result3 := <-ch

fmt.Println(result1)
fmt.Println(result2)
fmt.Println(result3)

Output:

1
2
3

func ToChar 

func ToChar(s string) []string

ToChar convert string to char slice. Play: https://go.dev/play/p/JJ1SvbFkVdM

Example 
result1 := ToChar("")
result2 := ToChar("abc")
result3 := ToChar("1 2#3")

fmt.Println(result1)
fmt.Println(result2)
fmt.Println(result3)

Output:

[]
[a b c]
[1   2 # 3]

func ToFloat 

func ToFloat(value any) (float64, error)

ToFloat convert value to float64, if input is not a float return 0.0 and error. Play: https://go.dev/play/p/4YTmPCibqHJ

Example 
result1, _ := ToFloat("")
result2, _ := ToFloat("abc")
result3, _ := ToFloat("-1")
result4, _ := ToFloat("-.11")
result5, _ := ToFloat("1.23e3")
result6, _ := ToFloat(true)

fmt.Println(result1)
fmt.Println(result2)
fmt.Println(result3)
fmt.Println(result4)
fmt.Println(result5)
fmt.Println(result6)

Output:

0
0
-1
-0.11
1230
0

func ToInt 

func ToInt(value any) (int64, error)

ToInt convert value to int64 value, if input is not numerical, return 0 and error. Play: https://go.dev/play/p/9_h9vIt-QZ_b

Example 
result1, _ := ToInt("123")
result2, _ := ToInt("-123")
result3, _ := ToInt(float64(12.3))
result4, _ := ToInt("abc")
result5, _ := ToInt(true)

fmt.Println(result1)
fmt.Println(result2)
fmt.Println(result3)
fmt.Println(result4)
fmt.Println(result5)

Output:

123
-123
12
0
0

func ToJson 

func ToJson(value any) (string, error)

ToJson convert value to a json string. Play: https://go.dev/play/p/2rLIkMmXWvR

Example 
aMap := map[string]int{"a": 1, "b": 2, "c": 3}
result1, err := ToJson(aMap)
if err != nil {
	fmt.Printf("%v", err)
}
fmt.Println(result1)

Output:

{"a":1,"b":2,"c":3}

func ToMap 

func ToMap[T any, K comparable, V any](array []T, iteratee func(T) (K, V)) map[K]V

ToMap convert a slice of structs to a map based on iteratee function. Play: https://go.dev/play/p/tVFy7E-t24l

Example 
type Message struct {
	name string
	code int
}
messages := []Message{
	{name: "Hello", code: 100},
	{name: "Hi", code: 101},
}
result := ToMap(messages, func(msg Message) (int, string) {
	return msg.code, msg.name
})

fmt.Println(result)

Output:

map[100:Hello 101:Hi]

func ToPointer 

func ToPointer[T any](value T) *T

ToPointer returns a pointer to passed value. Play: https://go.dev/play/p/ASf_etHNlw1

Example 
result := ToPointer(123)
fmt.Println(*result)

Output:

123

func ToString 

func ToString(value any) string

ToString convert value to string for number, string, []byte, will convert to string for other type (slice, map, array, struct) will call json.Marshal. Play: https://go.dev/play/p/nF1zOOslpQq

Example 
result1 := ToString("")
result2 := ToString(nil)
result3 := ToString(0)
result4 := ToString(1.23)
result5 := ToString(true)
result6 := ToString(false)
result7 := ToString([]int{1, 2, 3})

fmt.Println(result1)
fmt.Println(result2)
fmt.Println(result3)
fmt.Println(result4)
fmt.Println(result5)
fmt.Println(result6)
fmt.Println(result7)

Output:


0
1.23
true
false
[1,2,3]

Types

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Source Files

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