34 lines
630 B
Go
34 lines
630 B
Go
// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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// See page 74.
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// Printints demonstrates the use of bytes.Buffer to format a string.
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package main
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import (
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"bytes"
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"fmt"
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)
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//!+
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// intsToString is like fmt.Sprintf(values) but adds commas.
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func intsToString(values []int) string {
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var buf bytes.Buffer
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buf.WriteByte('[')
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for i, v := range values {
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if i > 0 {
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buf.WriteString(", ")
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}
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fmt.Fprintf(&buf, "%d", v)
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}
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buf.WriteByte(']')
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return buf.String()
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}
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func main() {
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fmt.Println(intsToString([]int{1, 2, 3})) // "[1, 2, 3]"
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}
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//!-
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