example_test.go

Documentation: hash/maphash

		 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  
		 5  package maphash_test
		 6  
		 7  import (
		 8  	"fmt"
		 9  	"hash/maphash"
		10  )
		11  
		12  func 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
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