68 lines
918 B
Go
68 lines
918 B
Go
package main
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import (
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"bufio"
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"fmt"
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"os"
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"sort"
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)
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func main() {
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s := bufio.NewScanner(os.Stdin)
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max := 0
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r := results{}
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for s.Scan() {
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if len(s.Text()) == 0 {
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continue
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}
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if len(s.Text()) > max {
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max = len(s.Text())
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}
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r = append(r, result{s.Text(), freq(s.Text())})
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}
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if err := s.Err(); err != nil {
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panic(err)
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}
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sort.Sort(r)
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f := fmt.Sprintf("%%%ds: %%v", max)
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for _, r := range r {
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fmt.Printf(f+"\n", r.name, r.h)
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}
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}
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type result struct {
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name string
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h histogram
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}
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type results []result
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type histogram []letter
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type letter struct {
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r rune
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count int
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}
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func (l letter) String() string {
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return fmt.Sprintf("%v: %d", string(l.r), l.count)
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}
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func freq(in string) histogram {
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m := map[rune]int{}
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for _, r := range in {
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if r == ' ' {
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continue
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}
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m[r]++
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}
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r := histogram{}
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for k, v := range m {
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r = append(r, letter{k, v})
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}
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sort.Sort(r)
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return r
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}
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