| package main | |
| import "fmt" | |
| type cons struct { | |
| car string | |
| cdr interface{} | |
| } | |
| func (c cons) String() string { | |
| if c.cdr == nil || c.cdr == (cons{}) { | |
| return c.car | |
| } | |
| return fmt.Sprintf("%v %v", c.car, c.cdr) | |
| } | |
| func main() { | |
| m := map[cons]string{} | |
| c := cons{} | |
| for _, s := range []string{"life?", "with my", "I doing", "What am"} { | |
| c = cons{s, c} | |
| } | |
| m[c] = "No idea." | |
| fmt.Println(c, m[c]) | |
| } |