Go Systems Programming

Reading a text file character by character

Although reading a text file character by character is not needed for the development of the wc(1) utility, it would be good to know how to implement it in Go. The name of the file will be charByChar.go and will be presented in four parts.

The first part is the following Go code:

package main 
 
import ( 
   "bufio" 
   "fmt" 
   "io/ioutil" 
   "os" 
   "strings" 
) 

Although charByChar.go does not have many lines of Go code, it needs lots of Go standard packages, which is a naive indication that the task it implements is not trivial. The second part is as follows:

func main() { 
   arguments := os.Args 
   if len(arguments) == 1 { 
         fmt.Println("Not enough arguments!") 
         os.Exit(1) 
   } 
   input := arguments[1] 

The third part is the following: ...