1// Copyright 2020 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package maphash_test
6
7import (
8	"fmt"
9	"hash/maphash"
10)
11
12func Example() {
13	// The zero Hash value is valid and ready to use; setting an
14	// initial seed is not necessary.
15	var h maphash.Hash
16
17	// Add a string to the hash, and print the current hash value.
18	h.WriteString("hello, ")
19	fmt.Printf("%#x\n", h.Sum64())
20
21	// Append additional data (in the form of a byte array).
22	h.Write([]byte{'w', 'o', 'r', 'l', 'd'})
23	fmt.Printf("%#x\n", h.Sum64())
24
25	// Reset discards all data previously added to the Hash, without
26	// changing its seed.
27	h.Reset()
28
29	// Use SetSeed to create a new Hash h2 which will behave
30	// identically to h.
31	var h2 maphash.Hash
32	h2.SetSeed(h.Seed())
33
34	h.WriteString("same")
35	h2.WriteString("same")
36	fmt.Printf("%#x == %#x\n", h.Sum64(), h2.Sum64())
37}
38