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golang fnv example
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package main | |
import ( | |
"bufio" | |
"fmt" | |
"hash/fnv" | |
"io" | |
"os" | |
) | |
func fingerprint(b []byte) uint64 { | |
hash := fnv.New64a() | |
hash.Write(b) | |
return hash.Sum64() | |
} | |
func main() { | |
var m = make(map[uint64][]byte) | |
f, err := os.Open("./words.txt") | |
if err != nil { | |
fmt.Printf("error opening file: %v\n", err) | |
os.Exit(1) | |
} | |
defer f.Close() | |
r := bufio.NewReader(f) | |
for { | |
line, _, err := r.ReadLine() | |
if err == io.EOF { | |
break | |
} | |
n := fingerprint(line) | |
if m[n] == nil { | |
m[n] = line | |
} else { | |
fmt.Printf("%s: %d\n", line, n) | |
} | |
} | |
} |
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