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crypto/rand: Example for Read.
R=adg, remyoudompheng, rsc, r CC=golang-dev https://golang.org/cl/6457085
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src/pkg/crypto/rand/example_test.go
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src/pkg/crypto/rand/example_test.go
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package rand_test
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import (
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"bytes"
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"crypto/rand"
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"fmt"
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"io"
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)
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// This example reads 10 cryptographically secure pseudorandom numbers from
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// rand.Reader and writes them to a byte slice.
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func ExampleRead() {
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c := 10
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b := make([]byte, c)
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n, err := io.ReadFull(rand.Reader, b)
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if n != len(b) || err != nil {
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fmt.Println("error:", err)
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return
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}
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// The slice should now contain random bytes instead of only zeroes.
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fmt.Println(bytes.Equal(b, make([]byte, c)))
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// Output:
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// false
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}
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