* bytes.go

package main

import "fmt"

func main() {
	// var str = "hello"
	str := "hello"
	// var a = str.split('').map(function(c) {return c.charCodeAt(0)})
	data := []byte(str)
	fmt.Println(data)

	// a.map(function(c) {return String.fromCharCode(c); }).join('')
	str = string(data[:])
	fmt.Println(str)
}

* run:

$ rm -f ./bytes && go build bytes.go && ./bytes
[104 101 108 108 111]
hello