有一些常用的工具函数，我们把它们放到gomisc这个包中。
工具介绍
Slice中的值Unique
func IntSliceUnique(s []int) []int
func StringSliceUnique(s []string) []string
示例：
package main
import (
"github.com/goinbox/gomisc"
"fmt"
)
func main() {
TestIntSliceUnique()
TestStringSliceUnique()
}
func TestIntSliceUnique() {
s := []int{1, 2, 2, 3, 3, 3, 4, 4, 4, 4}
fmt.Println("origin slice is: ", s)
s = gomisc.IntSliceUnique(s)
fmt.Println("after call slice is: ", s)
}
func TestStringSliceUnique() {
s := []string{"a", "ab", "ab", "abc", "abc", "abc", "abcd", "abcd", "abcd", "abcd", "abcd"}
fmt.Println("origin slice is: ", s)
s = gomisc.StringSliceUnique(s)
fmt.Println("after call slice is: ", s)
}
输出：
origin slice is: [1 2 2 3 3 3 4 4 4 4]
after call slice is: [1 2 3 4]
origin slice is: [a ab ab abc abc abc abcd abcd abcd abcd abcd]
after call slice is: [a ab abc abcd]
文件、目录是否存在
func FileExist(path string) bool
func DirExist(path string) bool
示例：
package main
import (
"github.com/goinbox/gomisc"
"fmt"
)
func main() {
TestFileExist()
TestDirExist()
}
func TestFileExist() {
f := "/etc/passwd"
r := gomisc.FileExist(f)
if r {
fmt.Println(f, "is exist")
} else {
fmt.Println(f, "is not exist")
}
}
func TestDirExist() {
d := "/home/ligang/devspace"
r := gomisc.DirExist(d)
if r {
fmt.Println(d, "is exist")
} else {
fmt.Println(d, "is not exist")
}
}
输出：
/etc/passwd is exist
/home/ligang/devspace is exist
多个[]byte拼接
func AppendBytes(b []byte, elems ...[]byte) []byte
示例：
package main
import (
"github.com/goinbox/gomisc"
"fmt"
)
func main() {
b := []byte("abc")
b = gomisc.AppendBytes(b, []byte("def"), []byte("ghi"))
fmt.Println(string(b))
}
输出：
abcdefghi
列出目录中的所有文件（包括子目录）
func ListFilesInDir(rootDir string) ([]string, error)
示例：
package main
import (
"github.com/goinbox/gomisc"
"fmt"
)
func main() {
fileList, err := gomisc.ListFilesInDir("/home/ligang/tmp")
if err != nil {
fmt.Println(err)
return
}
for _, path := range fileList {
fmt.Println(path)
}
}
输出：
/home/ligang/tmp/misc/accounts.json
/home/ligang/tmp/go/main.go
/home/ligang/tmp/go/.idea/modules.xml
/home/ligang/tmp/go/.idea/workspace.xml
/home/ligang/tmp/go/.idea/go.iml
保存/解析json文件
func SaveJsonFile(filePath string, v interface{}) error
func ParseJsonFile(filePath string, v interface{}) error
示例：
package main
import (
"github.com/goinbox/gomisc"
"fmt"
)
func main() {
filePath := "/tmp/test_save_parse_json_file.json"
v1 := make(map[string]string)
v1["k1"] = "a"
v1["k2"] = "b"
v1["k3"] = "c"
err := gomisc.SaveJsonFile(filePath, v1)
if err != nil {
fmt.Println("save json file failed: " + err.Error())
}
v2 := make(map[string]string)
err = gomisc.ParseJsonFile(filePath, &v2)
if err != nil {
fmt.Println("parse json file failed: " + err.Error())
}
ok := true
for k, v := range v2 {
if v != v1[k] {
ok = false
fmt.Println("save parse json file error, k: " + k + " not equal")
}
}
if ok {
fmt.Println("save parse json file ok")
}
}
输出：
save parse json file ok
字符串截取
func SubString(str string, start, cnt int) (string, error)
示例：
package main
import (
"github.com/goinbox/gomisc"
"fmt"
)
func main() {
s := "abcdefg"
_, err := gomisc.SubString(s, 3, 20)
fmt.Println(err)
_, err = gomisc.SubString(s, 10, 3)
fmt.Println(err)
ss, _ := gomisc.SubString(s, 3, 4)
fmt.Println(ss)
}
输出：
end too long
end too long
defg
时间格式化定义
const (
TIME_FMT_STR_YEAR = "2006"
TIME_FMT_STR_MONTH = "01"
TIME_FMT_STR_DAY = "02"
TIME_FMT_STR_HOUR = "15"
TIME_FMT_STR_MINUTE = "04"
TIME_FMT_STR_SECOND = "05"
)
// 时间格式：yy-mm-dd H:i:s
func TimeGeneralLayout() string {
layout := TIME_FMT_STR_YEAR + "-" + TIME_FMT_STR_MONTH + "-" + TIME_FMT_STR_DAY + " "
layout += TIME_FMT_STR_HOUR + ":" + TIME_FMT_STR_MINUTE + ":" + TIME_FMT_STR_SECOND
return layout
}
生成随机数
func RandByTime(t *time.Time) int64
示例：
package main
import (
"github.com/goinbox/gomisc"
"fmt"
"time"
)
func main() {
tm := time.Now()
fmt.Println(gomisc.RandByTime(&tm), gomisc.RandByTime(&tm), gomisc.RandByTime(nil))
}
输出：
6537266505970973466 6537266505970973466 5616191991172093652
欢迎大家使用，使用中有遇到问题随时反馈，我们会尽快响应，谢谢！