ASCII Table Writer

Generate ASCII table on the fly ... Installation is simple as

go get github.com/olekukonko/tablewriter

Features

• Automatic Padding
• Support Multiple Lines
• Supports Alignment
• Support Custom Separators
• Automatic Alignment of numbers & percentage
• Write directly to http , file etc via io.Writer
• Read directly from CSV file
• Optional row line via SetRowLine
• Normalise table header
• Make CSV Headers optional
• Enable or disable table border
• Set custom footer support
• Optional identical cells merging
• Set custom caption
• Optional reflowing of paragrpahs in multi-line cells.

Example 1 - Basic

data := [][]string{
    []string{"A", "The Good", "500"},
    []string{"B", "The Very very Bad Man", "288"},
    []string{"C", "The Ugly", "120"},
    []string{"D", "The Gopher", "800"},
}

table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Name", "Sign", "Rating"})

for _, v := range data {
    table.Append(v)
}
table.Render() // Send output

Output 1

+------+-----------------------+--------+
| NAME |         SIGN          | RATING |
+------+-----------------------+--------+
|  A   |       The Good        |    500 |
|  B   | The Very very Bad Man |    288 |
|  C   |       The Ugly        |    120 |
|  D   |      The Gopher       |    800 |
+------+-----------------------+--------+

Example 2 - Without Border / Footer / Bulk Append

data := [][]string{
    []string{"1/1/2014", "Domain name", "2233", "$10.98"},
    []string{"1/1/2014", "January Hosting", "2233", "$54.95"},
    []string{"1/4/2014", "February Hosting", "2233", "$51.00"},
    []string{"1/4/2014", "February Extra Bandwidth", "2233", "$30.00"},
}

table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Date", "Description", "CV2", "Amount"})
table.SetFooter([]string{"", "", "Total", "$146.93"}) // Add Footer
table.SetBorder(false)                                // Set Border to false
table.AppendBulk(data)                                // Add Bulk Data
table.Render()

Output 2

    DATE   |       DESCRIPTION        |  CV2  | AMOUNT
-----------+--------------------------+-------+----------
  1/1/2014 | Domain name              |  2233 | $10.98
  1/1/2014 | January Hosting          |  2233 | $54.95
  1/4/2014 | February Hosting         |  2233 | $51.00
  1/4/2014 | February Extra Bandwidth |  2233 | $30.00
-----------+--------------------------+-------+----------
                                        TOTAL | $146 93
                                      --------+----------

Example 3 - CSV

table, _ := tablewriter.NewCSV(os.Stdout, "testdata/test_info.csv", true)
table.SetAlignment(tablewriter.ALIGN_LEFT)   // Set Alignment
table.Render()

Output 3

+----------+--------------+------+-----+---------+----------------+
|  FIELD   |     TYPE     | NULL | KEY | DEFAULT |     EXTRA      |
+----------+--------------+------+-----+---------+----------------+
| user_id  | smallint(5)  | NO   | PRI | NULL    | auto_increment |
| username | varchar(10)  | NO   |     | NULL    |                |
| password | varchar(100) | NO   |     | NULL    |                |
+----------+--------------+------+-----+---------+----------------+

Example 4 - Custom Separator

table, _ := tablewriter.NewCSV(os.Stdout, "testdata/test.csv", true)
table.SetRowLine(true)         // Enable row line

// Change table lines
table.SetCenterSeparator("*")
table.SetColumnSeparator("╪")
table.SetRowSeparator("-")

table.SetAlignment(tablewriter.ALIGN_LEFT)
table.Render()

Output 4

*------------*-----------*---------*
╪ FIRST NAME ╪ LAST NAME ╪   SSN   ╪
*------------*-----------*---------*
╪ John       ╪ Barry     ╪ 123456  ╪
*------------*-----------*---------*
╪ Kathy      ╪ Smith     ╪ 687987  ╪
*------------*-----------*---------*
╪ Bob        ╪ McCornick ╪ 3979870 ╪
*------------*-----------*---------*

Example 5 - Markdown Format

data := [][]string{
	[]string{"1/1/2014", "Domain name", "2233", "$10.98"},
	[]string{"1/1/2014", "January Hosting", "2233", "$54.95"},
	[]string{"1/4/2014", "February Hosting", "2233", "$51.00"},
	[]string{"1/4/2014", "February Extra Bandwidth", "2233", "$30.00"},
}

table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Date", "Description", "CV2", "Amount"})
table.SetBorders(tablewriter.Border{Left: true, Top: false, Right: true, Bottom: false})
table.SetCenterSeparator("|")
table.AppendBulk(data) // Add Bulk Data
table.Render()

Output 5

|   DATE   |       DESCRIPTION        | CV2  | AMOUNT |
|----------|--------------------------|------|--------|
| 1/1/2014 | Domain name              | 2233 | $10.98 |
| 1/1/2014 | January Hosting          | 2233 | $54.95 |
| 1/4/2014 | February Hosting         | 2233 | $51.00 |
| 1/4/2014 | February Extra Bandwidth | 2233 | $30.00 |

Example 6 - Identical cells merging

data := [][]string{
  []string{"1/1/2014", "Domain name", "1234", "$10.98"},
  []string{"1/1/2014", "January Hosting", "2345", "$54.95"},
  []string{"1/4/2014", "February Hosting", "3456", "$51.00"},
  []string{"1/4/2014", "February Extra Bandwidth", "4567", "$30.00"},
}

table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Date", "Description", "CV2", "Amount"})
table.SetFooter([]string{"", "", "Total", "$146.93"})
table.SetAutoMergeCells(true)
table.SetRowLine(true)
table.AppendBulk(data)
table.Render()

Output 6

+----------+--------------------------+-------+---------+
|   DATE   |       DESCRIPTION        |  CV2  | AMOUNT  |
+----------+--------------------------+-------+---------+
| 1/1/2014 | Domain name              |  1234 | $10.98  |
+          +--------------------------+-------+---------+
|          | January Hosting          |  2345 | $54.95  |
+----------+--------------------------+-------+---------+
| 1/4/2014 | February Hosting         |  3456 | $51.00  |
+          +--------------------------+-------+---------+
|          | February Extra Bandwidth |  4567 | $30.00  |
+----------+--------------------------+-------+---------+
|                                       TOTAL | $146 93 |
+----------+--------------------------+-------+---------+

Table with color

data := [][]string{
	[]string{"1/1/2014", "Domain name", "2233", "$10.98"},
	[]string{"1/1/2014", "January Hosting", "2233", "$54.95"},
	[]string{"1/4/2014", "February Hosting", "2233", "$51.00"},
	[]string{"1/4/2014", "February Extra Bandwidth", "2233", "$30.00"},
}

table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Date", "Description", "CV2", "Amount"})
table.SetFooter([]string{"", "", "Total", "$146.93"}) // Add Footer
table.SetBorder(false)                                // Set Border to false

table.SetHeaderColor(tablewriter.Colors{tablewriter.Bold, tablewriter.BgGreenColor},
	tablewriter.Colors{tablewriter.FgHiRedColor, tablewriter.Bold, tablewriter.BgBlackColor},
	tablewriter.Colors{tablewriter.BgRedColor, tablewriter.FgWhiteColor},
	tablewriter.Colors{tablewriter.BgCyanColor, tablewriter.FgWhiteColor})

table.SetColumnColor(tablewriter.Colors{tablewriter.Bold, tablewriter.FgHiBlackColor},
	tablewriter.Colors{tablewriter.Bold, tablewriter.FgHiRedColor},
	tablewriter.Colors{tablewriter.Bold, tablewriter.FgHiBlackColor},
	tablewriter.Colors{tablewriter.Bold, tablewriter.FgBlackColor})

table.SetFooterColor(tablewriter.Colors{}, tablewriter.Colors{},
	tablewriter.Colors{tablewriter.Bold},
	tablewriter.Colors{tablewriter.FgHiRedColor})

table.AppendBulk(data)
table.Render()

Table with color Output

Example 7 - Set table caption

data := [][]string{
    []string{"A", "The Good", "500"},
    []string{"B", "The Very very Bad Man", "288"},
    []string{"C", "The Ugly", "120"},
    []string{"D", "The Gopher", "800"},
}

table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Name", "Sign", "Rating"})
table.SetCaption(true, "Movie ratings.")

for _, v := range data {
    table.Append(v)
}
table.Render() // Send output

Note: Caption text will wrap with total width of rendered table.

Output 7

+------+-----------------------+--------+
| NAME |         SIGN          | RATING |
+------+-----------------------+--------+
|  A   |       The Good        |    500 |
|  B   | The Very very Bad Man |    288 |
|  C   |       The Ugly        |    120 |
|  D   |      The Gopher       |    800 |
+------+-----------------------+--------+
Movie ratings.

Example 8 - Set NoWhiteSpace and TablePadding option

data := [][]string{
    {"node1.example.com", "Ready", "compute", "1.11"},
    {"node2.example.com", "Ready", "compute", "1.11"},
    {"node3.example.com", "Ready", "compute", "1.11"},
    {"node4.example.com", "NotReady", "compute", "1.11"},
}

table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"Name", "Status", "Role", "Version"})
table.SetAutoWrapText(false)
table.SetAutoFormatHeaders(true)
table.SetHeaderAlignment(ALIGN_LEFT)
table.SetAlignment(ALIGN_LEFT)
table.SetCenterSeparator("")
table.SetColumnSeparator("")
table.SetRowSeparator("")
table.SetHeaderLine(false)
table.SetBorder(false)
table.SetTablePadding("\t") // pad with tabs
table.SetNoWhiteSpace(true)
table.AppendBulk(data) // Add Bulk Data
table.Render()

Output 8

NAME             	STATUS  	ROLE   	VERSION 
node1.example.com	Ready   	compute	1.11   	
node2.example.com	Ready   	compute	1.11   	
node3.example.com	Ready   	compute	1.11   	
node4.example.com	NotReady	compute	1.11   	

Render table into a string

Instead of rendering the table to io.Stdout you can also render it into a string. Go 1.10 introduced the strings.Builder type which implements the io.Writer interface and can therefore be used for this task. Example:

package main

import (
    "strings"
    "fmt"

    "github.com/olekukonko/tablewriter"
)

func main() {
    tableString := &strings.Builder{}
    table := tablewriter.NewWriter(tableString)

    /*
     * Code to fill the table
     */

    table.Render()

    fmt.Println(tableString.String())
}

TODO

• Import Directly from CSV - done
• Support for SetFooter - done
• Support for SetBorder - done
• Support table with uneven rows - done
• Support custom alignment
• General Improvement & Optimisation
• NewHTML Parse table from HTML