1 // Copyright 2012 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 tabwriter_test 6 7 import ( 8 "fmt" 9 "os" 10 "text/tabwriter" 11 ) 12 13 func ExampleWriter_Init() { 14 w := new(tabwriter.Writer) 15 16 // Format in tab-separated columns with a tab stop of 8. 17 w.Init(os.Stdout, 0, 8, 0, '\t', 0) 18 fmt.Fprintln(w, "a\tb\tc\td\t.") 19 fmt.Fprintln(w, "123\t12345\t1234567\t123456789\t.") 20 fmt.Fprintln(w) 21 w.Flush() 22 23 // Format right-aligned in space-separated columns of minimal width 5 24 // and at least one blank of padding (so wider column entries do not 25 // touch each other). 26 w.Init(os.Stdout, 5, 0, 1, ' ', tabwriter.AlignRight) 27 fmt.Fprintln(w, "a\tb\tc\td\t.") 28 fmt.Fprintln(w, "123\t12345\t1234567\t123456789\t.") 29 fmt.Fprintln(w) 30 w.Flush() 31 32 // output: 33 // a b c d . 34 // 123 12345 1234567 123456789 . 35 // 36 // a b c d. 37 // 123 12345 1234567 123456789. 38 } 39 40 func Example_elastic() { 41 // Observe how the b's and the d's, despite appearing in the 42 // second cell of each line, belong to different columns. 43 w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, '.', tabwriter.AlignRight|tabwriter.Debug) 44 fmt.Fprintln(w, "a\tb\tc") 45 fmt.Fprintln(w, "aa\tbb\tcc") 46 fmt.Fprintln(w, "aaa\t") // trailing tab 47 fmt.Fprintln(w, "aaaa\tdddd\teeee") 48 w.Flush() 49 50 // output: 51 // ....a|..b|c 52 // ...aa|.bb|cc 53 // ..aaa| 54 // .aaaa|.dddd|eeee 55 } 56 57 func Example_trailingTab() { 58 // Observe that the third line has no trailing tab, 59 // so its final cell is not part of an aligned column. 60 const padding = 3 61 w := tabwriter.NewWriter(os.Stdout, 0, 0, padding, '-', tabwriter.AlignRight|tabwriter.Debug) 62 fmt.Fprintln(w, "a\tb\taligned\t") 63 fmt.Fprintln(w, "aa\tbb\taligned\t") 64 fmt.Fprintln(w, "aaa\tbbb\tunaligned") // no trailing tab 65 fmt.Fprintln(w, "aaaa\tbbbb\taligned\t") 66 w.Flush() 67 68 // output: 69 // ------a|------b|---aligned| 70 // -----aa|-----bb|---aligned| 71 // ----aaa|----bbb|unaligned 72 // ---aaaa|---bbbb|---aligned| 73 } 74
