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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tabwriter_test
import (
"fmt"
"os"
"text/tabwriter"
)
func ExampleWriter_Init() {
w := new(tabwriter.Writer)
// Format in tab-separated columns with a tab stop of 8.
w.Init(os.Stdout, 0, 8, 0, '\t', 0)
fmt.Fprintln(w, "a\tb\tc\td\t.")
fmt.Fprintln(w, "123\t12345\t1234567\t123456789\t.")
fmt.Fprintln(w)
w.Flush()
// Format right-aligned in space-separated columns of minimal width 5
// and at least one blank of padding (so wider column entries do not
// touch each other).
w.Init(os.Stdout, 5, 0, 1, ' ', tabwriter.AlignRight)
fmt.Fprintln(w, "a\tb\tc\td\t.")
fmt.Fprintln(w, "123\t12345\t1234567\t123456789\t.")
fmt.Fprintln(w)
w.Flush()
// output:
// a b c d .
// 123 12345 1234567 123456789 .
//
// a b c d.
// 123 12345 1234567 123456789.
}
func Example_elastic() {
// Observe how the b's and the d's, despite appearing in the
// second cell of each line, belong to different columns.
w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, '.', tabwriter.AlignRight|tabwriter.Debug)
fmt.Fprintln(w, "a\tb\tc")
fmt.Fprintln(w, "aa\tbb\tcc")
fmt.Fprintln(w, "aaa\t") // trailing tab
fmt.Fprintln(w, "aaaa\tdddd\teeee")
w.Flush()
// output:
// ....a|..b|c
// ...aa|.bb|cc
// ..aaa|
// .aaaa|.dddd|eeee
}
func Example_trailingTab() {
// Observe that the third line has no trailing tab,
// so its final cell is not part of an aligned column.
const padding = 3
w := tabwriter.NewWriter(os.Stdout, 0, 0, padding, '-', tabwriter.AlignRight|tabwriter.Debug)
fmt.Fprintln(w, "a\tb\taligned\t")
fmt.Fprintln(w, "aa\tbb\taligned\t")
fmt.Fprintln(w, "aaa\tbbb\tunaligned") // no trailing tab
fmt.Fprintln(w, "aaaa\tbbbb\taligned\t")
w.Flush()
// output:
// ------a|------b|---aligned|
// -----aa|-----bb|---aligned|
// ----aaa|----bbb|unaligned
// ---aaaa|---bbbb|---aligned|
}