This recipe demonstrates how to use flag to build a command line program, how to convert string slice to string and how to write sentence to file specified by user. Usage example: writefile -f test.txt hi this is a test. package main import ( "flag" "io" "log" "os" "strings" ) func convertSliceToString(s []string) string { … Continue reading Golang – Write sentence to file →

In python I can use Jinja2 template module to parse variables to Cisco command template, in Golang there is text/template which is similar to Jinja2 template engine for python. This recipe gives an example on how to parse variables into a text template. The types within the struct have to be exported in order for … Continue reading Golang – Template →

This recipe shows how to obfuscate the password when user is typing the password. package p1 import ( "fmt" "log" "os" "golang.org/x/crypto/ssh/terminal" ) func getPassword() string { fmt.Println("\nPassword: ") // https://godoc.org/golang.org/x/crypto/ssh/terminal#ReadPassword // terminal.ReadPassword accepts file descriptor as argument, returns byte slice and error. passwd, e := terminal.ReadPassword(int(os.Stdin.Fd())) if e != nil { log.Fatal(e) } // … Continue reading Golang – Obfuscate password input →

This is a recipe for reading a text file. package main import ( "bufio" "fmt" "log" "os" ) func errCallback(e error) { // General log error to console. if e != nil { log.Fatal(e) } } func openTextFile(fname string) { // os.Open returns file pointer and error fptr, e := os.Open(fname) errCallback(e) defer fptr.Close() // … Continue reading Golang – Reading a text file →