Guaderxx

func GetCurrentDir() string {
    path, err := filepath.Abs(filepath.Dir(os.Args[0]))
    if err != nil {
        log.Fatalln("GetCurrentDir Error: ", err)
    }
    return path
}

Guaderxx

func CreateDir(path, dirName string) string {
    dirPath := filepath.Join(path, dirName)
    if _, err := os.Stat(dirPath); os.IsNotExist(err) {
        os.Mkdir(dirPath, 0777)
        os.Chmod(dirPath, 0777)
    }
    return dirPath
}

Guaderxx

func getUrls(b []byte) []string {
    text := `<figure><img src="/file/fe6c70eb7d91b89ed9082.jpg"><figcaption></figcaption></figure>
<figure><img src="/file/fa176712a283f7c3d9ed1.jpg"><figcaption></figcaption></figure>
<figure><img src="/file/199530a4defd3427eb8df.jpg"><figcaption></figcaption></figure>
<figure><img src="/file/3a0bc14da38f4f3022662.jpg"><figcaption></figcaption></figure>
<figure><imgsrc="/file/51b0eb8b8893a56c0d7a8.jpg"><figcaption></figcaption></figure>
<figure><img src="/file/75b0d40cafc8cf212bbb6.jpg"><figcaption></figcaption></figure>
<figure><img src="/file/b9e628bfa1aada10ac554.jpg"><figcaption></figcaption></figure>`
    
    r := regexp.MustCompile(`/file/[a-z0-9]*.jpg`)

Guaderxx

arr := []int{8,4,2,5,1}
idx := make([]int, len(arr))

for i := range idx {
  idx[i] = i
}

sort.Slice(ids, func(i, j int) bool {
  return arr[ids[i]] < arr[ids[j]]
})

Guaderxx

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

Guaderxx

package main

import (
    "fmt"
    "log"
    "net/http"
    "time"
)

// server

Guaderxx

package main

func CopyIJ(src [2048][2048]int, dst [2048][2048]int) {
	for i := 0; i < 2048; i++ {
		for j := 0; j < 2048; j++ {
			dst[i][j] = src[i][j]
		}
	}
}

Guaderxx

package main

import (
	"fmt"
	"sync"
)

var wg sync.WaitGroup

func workerNumber(ok <-chan byte, next chan<- int) {

Guaderxx

package main

import (
	"log"

	"github.com/gin-gonic/gin"
)

func main() {
	r := gin.Default()

Guaderxx

package main

import (
	"fmt"
	"strings"
)

func TrimBrackets(str string) string {
	return strings.Trim(str, "()[]{}")
}