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  1. package main
  2.  
  3. import (
  4.   "os"
  5.   "io/ioutil"
  6.   "fmt"
  7.   "strings"
  8. )
  9.  
  10. func main() {
  11.   file := os.Args[1]
  12.   word := os.Args[2]
  13.  
  14.   buffer, err := ioutil.ReadFile(file)
  15.  
  16.   if( err != nil ) {
  17.     fmt.Println("failed to read: ", file)
  18.     return
  19.   }
  20.  
  21.   content := string(buffer)
  22.   fmt.Println( search1(word,content) )
  23.   fmt.Println( search2(word,content) )
  24.   fmt.Println( search3(word,content) )
  25. }
  26.  
  27.  
  28. func search1( word string, content string ) bool {
  29.   return strings.Index(content,word) != (-1)
  30. }
  31.  
  32. func search2( word string, content string ) int {
  33.   return strings.Count(content,word);
  34. }
  35.  
  36. type Pos struct {
  37.   a int
  38.   b int
  39. }
  40. type Search3Result struct {
  41.   bool
  42.   int
  43.   pos []Pos
  44. }
  45.  
  46. func search3( word string, content string ) Search3Result {
  47.   indices := []Pos{}
  48.  
  49.   for l, line := range strings.Split(content,"\n") {
  50.     for i := 0;; i++ {
  51.       n := strings.Index(line[i:],word)
  52.       if( n == (-1) ){ break; }
  53.       i += n
  54.       indices = append(indices, Pos{l,i})
  55.     }
  56.   }
  57.  
  58.   return Search3Result{ len(indices) > 0, len(indices), indices }
  59. }
  60.  
  61.  
Runtime error #stdin #stdout #stderr 0s 3152KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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panic: runtime error: index out of range

goroutine 1 [running]:
panic(0x4a5140, 0xc42000a090)
	/usr/lib/go-1.7/src/runtime/panic.go:500 +0x1a1
main.main()
	/home/4leAaj/prog.go:11 +0x435
https://ideone.com/HpfQo5
language:
Go (go 1.12.1)
created:
8 years ago
visibility:
secret

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