goutil/dump - is a golang data printing toolkit that can print beautiful and easy-to-read go slice, map, and struct data.
main functions:
- Simple to use, just call
dump.P(vars…)directly - Supports all basic data types.
- Supports slice, map, and struct data structures.
- Supports passing in and printing multiple variables
- Default output call location, easy to use
- Supports custom features, such as indentation and color themes.
Preview：
Git Repo:
Print basic type
package main
import "github.com/gookit/goutil/dump"
// rum demo:
// go run ./dump/_examples/basic_types.go
func main() {
dump.P(
nil, true,
12, int8(12), int16(12), int32(12), int64(12),
uint(22), uint8(22), uint16(22), uint32(22), uint64(22),
float32(23.78), float64(56.45),
'c', byte('d'),
"string",
)
}
Output：
Print slice
Printing array, slice will output one element per line, and will output the length at the end.
package main
import "github.com/gookit/goutil/dump"
// rum demo:
// go run ./dump/_examples/slice.go
func main() {
dump.P(
[]byte("abc"),
[]int{1, 2, 3},
[]string{"ab", "cd"},
[]interface{}{
"ab",
234,
[]int{1, 3},
[]string{"ab", "cd"},
},
)
}
Output：
Print map
When printing the map data structure, one element per line is output, and the length of the map is output at the end.
package main
import "github.com/gookit/goutil/dump"
// rum demo:
// go run ./map.go
// go run ./dump/_examples/map.go
func main() {
dump.P(
map[string]interface{}{
"key0": 123,
"key1": "value1",
"key2": []int{1, 2, 3},
"key3": map[string]string{
"k0": "v0",
"k1": "v1",
},
},
)
}
Output：
Print struct
Print struct data, the pointer type will automatically print the underlying real data.
package main
import (
"fmt"
"github.com/gookit/color"
"github.com/gookit/goutil/dump"
)
// rum demo:
// go run ./struct.go
// go run ./dump/_examples/struct.go
func main() {
s1 := &struct {
cannotExport map[string]interface{}
}{
cannotExport: map[string]interface{}{
"key1": 12,
"key2": "abcd123",
},
} s2 := struct {
ab string
Cd int
}{
"ab", 23,
}
color.Infoln("- Use fmt.Println:")
fmt.Println(s1, s2)
color.Infoln("\n- Use dump.Println:")
dump.P(
s1,
s2,
)
}
Output：
Custom dumper
you can customize dumper options. Such as indentation and color theme
// Options for dump vars
type Options struct {
// Output the output writer
Output io.Writer
// NoType dont show data type TODO
NoType bool
// NoColor don't with color
NoColor bool
// IndentLen width. default is 2
IndentLen int
// IndentChar default is one space
IndentChar byte
// MaxDepth for nested print
MaxDepth int
// ShowFlag for display caller position
ShowFlag int
// MoreLenNL array/slice elements length > MoreLenNL, will wrap new line
// MoreLenNL int
// CallerSkip skip for call runtime.Caller()
CallerSkip int
// ColorTheme for print result.
ColorTheme Theme
}
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