1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | package main import "fmt" func main() { fmt.Println( "Welcome to goLang Maps" ) languages := make(map[string]string) languages[ "JS" ] = "Javascript" languages[ "JA" ] = "Java" languages[ "PY" ] = "Python" for key, element := range languages { fmt.Println( "Key:" , key, "=>" , "Element:" , element) } } |
How to write map values into a file
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | package main import ( "fmt" "log" "os" ) func main() { fmt.Println( "Welcome to goLang Maps" ) languages := make(map[string]string) languages[ "JS" ] = "Javascript" languages[ "JA" ] = "Java" languages[ "PY" ] = "Python" f, err := os.Create( "test.txt" ) if err != nil { fmt.Println(err) return } // remember to close the file defer f.Close() for key, element := range languages { fmt.Println( "Key:" , key, "=>" , "Element:" , element) _, err := f.WriteString(key + "," + element + "\n" ) if err != nil { log.Fatal(err) } } } |
How to read line by line from a file and create map values
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | package main import ( "bufio" "fmt" "log" "os" "strings" ) func main() { fmt.Println( "Welcome to goLang Maps" ) languages := make(map[string]string) file, err := os.Open( "test.txt" ) if err != nil { log.Fatal(err) } // remember to close the file defer file.Close() scanner := bufio.NewScanner(file) for scanner.Scan() { keyvalue := scanner.Text() keypairs := strings.Split(keyvalue, "," ) languages[keypairs[ 0 ]] = keypairs[ 1 ] } fmt.Println(languages) if err := scanner.Err(); err != nil { log.Fatal(err) } } |