func AnagramsFromReader(in io.Reader) map[string][]string {
reader := bufio.NewReader(in)
var nextTok func() (string, error)
anagrams := make(map[string][]string)
nextTok = func() (string, error) {
line, notDone, err := reader.ReadLine()
if err != nil {
return "", err
}
for notDone {
var nextChunk []byte
nextChunk, notDone, err = reader.ReadLine()
if err != nil {
return "", err
}
line = append(line, nextChunk...)
}
return string(line), err
}
// nextTok = func() (string, error) {
// line, notDone, err := reader.ReadLine()
// if err != nil {
// return "", err
// } else if notDone {
// restline, err2 := nextTok() // possible problem
// if err2 != nil {
// return "", err2
// }
// return string(line) + string(restline), nil
// }
// return string(line), err
// }
line, linerr := nextTok()
for linerr == nil {
if !wordValidator.MatchString(line) { // skip non validating lines
line, linerr = nextTok()
continue
}
ss := ss.NewSortString(line)
sort.Sort(ss)
index := ss.String()
slice := anagrams[index]
if slice == nil {
slice = make([]string, 1)
}
anagrams[index] = append(slice, line)
line, linerr = nextTok()
}
return anagrams
}
// maps have unique keys, so lets just use it as a set
func getUniques(perms []string, size int) map[string]int {
results := make(map[string]int)
for _, cur := range perms {
cur = cur[0:size] // slice it
sorts := ss.NewSortString(cur)
sort.Sort(sorts) // sort it
results[sorts.String()] = 0 // store it
}
return results
}
func runHandler(w http.ResponseWriter, r *http.Request) {
in := ss.NewSortString(r.FormValue("input"))
allperms := getAllPerms(in)
size := in.Len()
output := "Results are: \n"
for n := size; n >= 3; n-- {
output += fmt.Sprintf("\n\nFor size: %d\n", n)
uniques := getUniques(allperms, n)
for k, _ := range uniques {
output += fmt.Sprintf("%s", strings.Join(anagrams[k], "\n"))
}
}
output += fmt.Sprintf("\n")
renderTemplate(w, "results", &templateParams{output, in.String()})
}
