Common library for Golang
Return "" if a string pointer is nil
var value *string
lang.StringOf(value) // return ""
var value *string
x := "abc"
value = &x
lang.StringOf(value) // return "abc"
var value []byte
lang.StringOf(value) // return string(value)
Return last X characters of a string
x := "abc"
lang.StringLastOf(value, 2) // return "bc"