golang example_test 代码
文件路径：/src/text/tabwriter/example_test.go
/ 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|
}