After this little introduction, it is time to see the Go code of wc.go, which will be presented in five parts. The first part is the expected preamble:
package main import ( "bufio" "flag" "fmt" "io" "os" "regexp" )
The second part is the implementation of the countLines() function, which includes the core functionality of the program. Note that the name countLines() may have been a poor choice as countLines() also counts the words and the characters of a file:
func countLines(filename string) (int, int, int) {
var err error
var numberOfLines int
var numberOfCharacters int
var numberOfWords int
numberOfLines = 0 numberOfCharacters = 0 numberOfWords = 0 f, err := os.Open(filename) if err != nil { fmt.Printf("error opening ...
