Useful go tips

append.go

package main

import (
	"fmt"
)

func main() {
var a []string= []string{"a", "b"}
var b []string = []string{"c", "d"}
	fmt.Println("Hello, playground", append(a, b...))
}

reverse.go

package main

import (
	"fmt"
	"math"
	"strconv"
)

func main() {
	n := int64(14)

	v := string(strconv.FormatInt(n, 2))

	for k, v := range Reverse(v) {
		if string(v) != "0" {
			fmt.Println(math.Pow(2, float64(k)))
		}
	}

}

func Reverse(s string) string {
	r := []rune(s)
	for i, j := 0, len(r)-1; i < len(r)/2; i, j = i+1, j-1 {
		r[i], r[j] = r[j], r[i]
	}
	return string(r)
}

write-json.go

// Code to write to json file

outjson, _ := json.Marshal(job)
err := ioutil.WriteFile("output.json", outjson, 0644)
log.Println(err)

// Go doesn't have math.round
// Multiple tags is not supported