If you just need an executable tool to format tables, please use csvtk pretty (code, usage and example), which uses this package.

Table of Contents

• Features
• Install
• Examples
• Styles
• Support
• License
• Alternate packages

• Supporting streaming output (optional).

  When a writer is configured, a newly added row is formatted and written to the writer immediately. It is memory-effective for a large number of rows. And it is helpful to pipe the data in shell.

• Supporting wrapping text or clipping text.

  The minimum and maximum width of the column can be configured for each column or globally.

• Configured table styles.

  Some preset styles are also provided.

• Unicode supported

Not-supported features:

• Row/column span
• Colorful text

go get -u github.com/shenwei356/table

Note that the output is well-formatted in the terminal. However, rows containing Unicode are not displayed appropriately in text editors and browsers.

1. Basic usages.

    tbl := New().HumanizeNumbers().MaxWidth(40)
   
    tbl.Header([]string{
        "id",
        "name",
        "sentence",
    })
    tbl.AddRow([]interface{}{100, "Donec Vitae", "Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse."})
    tbl.AddRow([]interface{}{2000, "Quaerat Voluptatem", "At vero eos et accusamus et iusto odio."})
    tbl.AddRow([]interface{}{3000000, "Aliquam lorem", "Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper libero."})
   
    fmt.Printf("%s\n", tbl.Render(StyleGrid))
   
    +-----------+--------------------+------------------------------------------+
    | id        | name               | sentence                                 |
    +===========+====================+==========================================+
    | 100       | Donec Vitae        | Quis autem vel eum iure reprehenderit    |
    |           |                    | qui in ea voluptate velit esse.          |
    +-----------+--------------------+------------------------------------------+
    | 2,000     | Quaerat Voluptatem | At vero eos et accusamus et iusto odio.  |
    +-----------+--------------------+------------------------------------------+
    | 3,000,000 | Aliquam lorem      | Curabitur ullamcorper ultricies nisi.    |
    |           |                    | Nam eget dui. Etiam rhoncus. Maecenas    |
    |           |                    | tempus, tellus eget condimentum          |
    |           |                    | rhoncus, sem quam semper libero.         |
    +-----------+--------------------+------------------------------------------+
   

2. Unicode.

    tbl := New().HumanizeNumbers().MaxWidth(20) //.ClipCell("...")
   
    tbl.Header([]string{
        "id",
        "name",
        "sentence",
    })
    tbl.AddRow([]interface{}{100, "Wei Shen", "How are you?"})
    tbl.AddRow([]interface{}{1000, "沈 伟", "I'm fine, thank you. And you?"})
    tbl.AddRow([]interface{}{100000, "沈伟", "谢谢，我很好，你呢？"})
   
    fmt.Printf("%s\n", tbl.Render(StyleGrid))
   
    style: grid
    +---------+----------+----------------------+
    | id      | name     | sentence             |
    +=========+==========+======================+
    | 100     | Wei Shen | How are you?         |
    +---------+----------+----------------------+
    | 1,000   | 沈 伟    | I'm fine, thank      |
    |         |          | you. And you?        |
    +---------+----------+----------------------+
    | 100,000 | 沈伟     | 谢谢，我很好         |
    |         |          | ，你呢？             |
    +---------+----------+----------------------+
   

   

    // clipping text instead of wrapping
   
    fmt.Printf("%s\n", tbl.ClipCell("...").Render(StyleGrid))
   
    +---------+----------+----------------------+
    | id      | name     | sentence             |
    +=========+==========+======================+
    | 100     | Wei Shen | How are you?         |
    +---------+----------+----------------------+
    | 1,000   | 沈 伟    | I'm fine, thank y... |
    +---------+----------+----------------------+
    | 100,000 | 沈伟     | 谢谢，我很好，你呢？ |
    +---------+----------+----------------------+
   

   

3. Custom columns format. (Column-specific width options override the global ones)

    tbl := New().MinWidth(10).MaxWidth(30)
   
    tbl.HeaderWithFormat([]Column{
        {Header: "number", MinWidth: 5, MaxWidth: 20, HumanizeNumbers: true, Align: AlignRight},
        {Header: "name", MinWidth: 14, MaxWidth: 25, Align: AlignCenter},
        {Header: "sentence", MaxWidth: 40, Align: AlignLeft},
    })
   
    tbl.AddRow([]interface{}{100, "Donec Vitae", "Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse."})
    tbl.AddRow([]interface{}{2000, "Quaerat Voluptatem", "At vero eos et accusamus et iusto odio."})
    tbl.AddRow([]interface{}{3000000, "Aliquam lorem", "Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper libero."})
   
    fmt.Printf("%s\n", tbl.Render(StyleGrid))
    
    +------------+--------------------+--------------------------------+
    |     number |        name        | sentence                       |
    +============+====================+================================+
    |        100 |    Donec Vitae     | Quis autem vel eum iure        |
    |            |                    | reprehenderit qui in ea        |
    |            |                    | voluptate velit esse.          |
    +------------+--------------------+--------------------------------+
    |      2,000 | Quaerat Voluptatem | At vero eos et accusamus et    |
    |            |                    | iusto odio.                    |
    +------------+--------------------+--------------------------------+
    |  3,000,000 |   Aliquam lorem    | Curabitur ullamcorper          |
    |            |                    | ultricies nisi. Nam eget dui.  |
    |            |                    | Etiam rhoncus. Maecenas        |
    |            |                    | tempus, tellus eget            |
    |            |                    | condimentum rhoncus, sem quam  |
    |            |                    | semper libero.                 |
    +------------+--------------------+--------------------------------+
   

4. Streaming the output, i.e., a newly added row is formatted and written to the configured writer immediately.

    tbl := New().MinWidth(10)
   
    // write to stdout, and determine the max width according to the first row
    tbl.Writer(os.Stdout, 1)
    tbl.Style(StyleGrid)
   
    tbl.Header([]string{
        "number",
        "name",
        "sentence",
    })
   
    // when a new row is added, it writes to stdout immediately.
    tbl.AddRow([]interface{}{100, "Donec Vitae", "Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse."})
    tbl.AddRow([]interface{}{2000, "Quaerat Voluptatem", "At vero eos et accusamus et iusto odio."})
    tbl.AddRow([]interface{}{3000000, "Aliquam lorem", "Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper libero."})
   
    // flush the remaining data
    tbl.Flush()
   
   
    +------------+-------------+-----------------------------------------------------------------------+
    | number     | name        | sentence                                                              |
    +============+=============+=======================================================================+
    | 100        | Donec Vitae | Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse. |
    +------------+-------------+-----------------------------------------------------------------------+
    | 2000       | Quaerat     | At vero eos et accusamus et iusto odio.                               |
    |            | Voluptatem  |                                                                       |
    +------------+-------------+-----------------------------------------------------------------------+
    | 3000000    | Aliquam     | Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus.    |
    |            | lorem       | Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper     |
    |            |             | libero.                                                               |
    +------------+-------------+-----------------------------------------------------------------------+
   

5. Custom delimiter for wrapping text. In this example, complete lineage contains a list of words joined with ;.

    tbl := New()
   
    tbl.SetHeader([]string{
        "taxid",
        "name",
        "complete lineage",
    })
    tbl.AddRow([]interface{}{
        9606,
        "Homo sapiens",
        "cellular organisms;Eukaryota;Opisthokonta;Metazoa;Eumetazoa;Bilateria;Deuterostomia;Chordata;Craniata;Vertebrata;Gnathostomata;Teleostomi;Euteleostomi;Sarcopterygii;Dipnotetrapodomorpha;Tetrapoda;Amniota;Mammalia;Theria;Eutheria;Boreoeutheria;Euarchontoglires;Primates;Haplorrhini;Simiiformes;Catarrhini;Hominoidea;Hominidae;Homininae;Homo;Homo sapiens",
    })
    tbl.AddRow([]interface{}{
        562, "Escherichia coli",
        "cellular organisms;Bacteria;Pseudomonadota;Gammaproteobacteria;Enterobacterales;Enterobacteriaceae;Escherichia;Escherichia coli",
    })
   
    fmt.Printf("%s\n", tbl.WrapDelimiter(';').AlignLeft().MaxWidth(50).Render(StyleGrid))
   
    +-------+------------------+----------------------------------------------------+
    | taxid | name             | complete lineage                                   |
    +=======+==================+====================================================+
    | 9606  | Homo sapiens     | cellular organisms;Eukaryota;Opisthokonta;Metazoa; |
    |       |                  | Eumetazoa;Bilateria;Deuterostomia;Chordata;        |
    |       |                  | Craniata;Vertebrata;Gnathostomata;Teleostomi;      |
    |       |                  | Euteleostomi;Sarcopterygii;Dipnotetrapodomorpha;   |
    |       |                  | Tetrapoda;Amniota;Mammalia;Theria;Eutheria;        |
    |       |                  | Boreoeutheria;Euarchontoglires;Primates;           |
    |       |                  | Haplorrhini;Simiiformes;Catarrhini;Hominoidea;     |
    |       |                  | Hominidae;Homininae;Homo;Homo sapiens              |
    +-------+------------------+----------------------------------------------------+
    | 562   | Escherichia coli | cellular organisms;Bacteria;Pseudomonadota;        |
    |       |                  | Gammaproteobacteria;Enterobacterales;              |
    |       |                  | Enterobacteriaceae;Escherichia;Escherichia coli    |
    +-------+------------------+----------------------------------------------------+
   

Note that the output is well-formatted in the terminal. However, rows containing Unicode are not displayed appropriately in text editors and browsers.

style: plain
id          name                 sentence
100         Donec Vitae          Quis autem vel eum iure reprehenderit
                                 qui in ea voluptate velit esse.
2,000       Quaerat Voluptatem   At vero eos et accusamus et iusto odio.
250         with tab             <-left cell has one tab.
250         with  tab            <-left cell has two tabs.
3,000,000   Aliquam lorem        Curabitur ullamcorper ultricies nisi.
                                 Nam eget dui. Etiam rhoncus. Maecenas
                                 tempus, tellus eget condimentum
                                 rhoncus, sem quam semper libero.


style: simple
---------------------------------------------------------------------------
 id          name                 sentence
---------------------------------------------------------------------------
 100         Donec Vitae          Quis autem vel eum iure reprehenderit
                                  qui in ea voluptate velit esse.
 2,000       Quaerat Voluptatem   At vero eos et accusamus et iusto odio.
 250         with tab             <-left cell has one tab.
 250         with  tab            <-left cell has two tabs.
 3,000,000   Aliquam lorem        Curabitur ullamcorper ultricies nisi.
                                  Nam eget dui. Etiam rhoncus. Maecenas
                                  tempus, tellus eget condimentum
                                  rhoncus, sem quam semper libero.
---------------------------------------------------------------------------


style: 3line
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 id          name                 sentence
---------------------------------------------------------------------------
 100         Donec Vitae          Quis autem vel eum iure reprehenderit
                                  qui in ea voluptate velit esse.
 2,000       Quaerat Voluptatem   At vero eos et accusamus et iusto odio.
 250         with tab             <-left cell has one tab.
 250         with  tab            <-left cell has two tabs.
 3,000,000   Aliquam lorem        Curabitur ullamcorper ultricies nisi.
                                  Nam eget dui. Etiam rhoncus. Maecenas
                                  tempus, tellus eget condimentum
                                  rhoncus, sem quam semper libero.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


style: grid
+-----------+--------------------+------------------------------------------+
| id        | name               | sentence                                 |
+===========+====================+==========================================+
| 100       | Donec Vitae        | Quis autem vel eum iure reprehenderit    |
|           |                    | qui in ea voluptate velit esse.          |
+-----------+--------------------+------------------------------------------+
| 2,000     | Quaerat Voluptatem | At vero eos et accusamus et iusto odio.  |
+-----------+--------------------+------------------------------------------+
| 250       | with tab           | <-left cell has one tab.                 |
+-----------+--------------------+------------------------------------------+
| 250       | with  tab          | <-left cell has two tabs.                |
+-----------+--------------------+------------------------------------------+
| 3,000,000 | Aliquam lorem      | Curabitur ullamcorper ultricies nisi.    |
|           |                    | Nam eget dui. Etiam rhoncus. Maecenas    |
|           |                    | tempus, tellus eget condimentum          |
|           |                    | rhoncus, sem quam semper libero.         |
+-----------+--------------------+------------------------------------------+

style: light
┌-----------┬--------------------┬------------------------------------------┐
| id        | name               | sentence                                 |
├===========┼====================┼==========================================┤
| 100       | Donec Vitae        | Quis autem vel eum iure reprehenderit    |
|           |                    | qui in ea voluptate velit esse.          |
├-----------┼--------------------┼------------------------------------------┤
| 2,000     | Quaerat Voluptatem | At vero eos et accusamus et iusto odio.  |
├-----------┼--------------------┼------------------------------------------┤
| 250       | with tab           | <-left cell has one tab.                 |
├-----------┼--------------------┼------------------------------------------┤
| 250       | with  tab          | <-left cell has two tabs.                |
├-----------┼--------------------┼------------------------------------------┤
| 3,000,000 | Aliquam lorem      | Curabitur ullamcorper ultricies nisi.    |
|           |                    | Nam eget dui. Etiam rhoncus. Maecenas    |
|           |                    | tempus, tellus eget condimentum          |
|           |                    | rhoncus, sem quam semper libero.         |
└-----------┴--------------------┴------------------------------------------┘

style: round

╭-----------┬--------------------┬------------------------------------------╮
| id        | name               | sentence                                 |
├===========┼====================┼==========================================┤
| 100       | Donec Vitae        | Quis autem vel eum iure reprehenderit    |
|           |                    | qui in ea voluptate velit esse.          |
├-----------┼--------------------┼------------------------------------------┤
| 2,000     | Quaerat Voluptatem | At vero eos et accusamus et iusto odio.  |
├-----------┼--------------------┼------------------------------------------┤
| 250       | with tab           | <-left cell has one tab.                 |
├-----------┼--------------------┼------------------------------------------┤
| 250       | with  tab          | <-left cell has two tabs.                |
├-----------┼--------------------┼------------------------------------------┤
| 3,000,000 | Aliquam lorem      | Curabitur ullamcorper ultricies nisi.    |
|           |                    | Nam eget dui. Etiam rhoncus. Maecenas    |
|           |                    | tempus, tellus eget condimentum          |
|           |                    | rhoncus, sem quam semper libero.         |
╰-----------┴--------------------┴------------------------------------------╯

style: bold
┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ id        ┃ name               ┃ sentence                                 ┃
┣━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃ 100       ┃ Donec Vitae        ┃ Quis autem vel eum iure reprehenderit    ┃
┃           ┃                    ┃ qui in ea voluptate velit esse.          ┃
┣━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃ 2,000     ┃ Quaerat Voluptatem ┃ At vero eos et accusamus et iusto odio.  ┃
┣━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃ 250       ┃ with tab           ┃ <-left cell has one tab.                 ┃
┣━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃ 250       ┃ with  tab          ┃ <-left cell has two tabs.                ┃
┣━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃ 3,000,000 ┃ Aliquam lorem      ┃ Curabitur ullamcorper ultricies nisi.    ┃
┃           ┃                    ┃ Nam eget dui. Etiam rhoncus. Maecenas    ┃
┃           ┃                    ┃ tempus, tellus eget condimentum          ┃
┃           ┃                    ┃ rhoncus, sem quam semper libero.         ┃
┗━━━━━━━━━━━┻━━━━━━━━━━━━━━━━━━━━┻━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

style: double
╔═══════════╦════════════════════╦══════════════════════════════════════════╗
║ id        ║ name               ║ sentence                                 ║
╠═══════════╬════════════════════╬══════════════════════════════════════════╣
║ 100       ║ Donec Vitae        ║ Quis autem vel eum iure reprehenderit    ║
║           ║                    ║ qui in ea voluptate velit esse.          ║
╠═══════════╬════════════════════╬══════════════════════════════════════════╣
║ 2,000     ║ Quaerat Voluptatem ║ At vero eos et accusamus et iusto odio.  ║
╠═══════════╬════════════════════╬══════════════════════════════════════════╣
║ 250       ║ with tab           ║ <-left cell has one tab.                 ║
╠═══════════╬════════════════════╬══════════════════════════════════════════╣
║ 250       ║ with  tab          ║ <-left cell has two tabs.                ║
╠═══════════╬════════════════════╬══════════════════════════════════════════╣
║ 3,000,000 ║ Aliquam lorem      ║ Curabitur ullamcorper ultricies nisi.    ║
║           ║                    ║ Nam eget dui. Etiam rhoncus. Maecenas    ║
║           ║                    ║ tempus, tellus eget condimentum          ║
║           ║                    ║ rhoncus, sem quam semper libero.         ║
╚═══════════╩════════════════════╩══════════════════════════════════════════╝

Please open an issue to report bugs, propose new functions or ask for help.

Copyright (c) 2023-2024, Wei Shen (shenwei356@gmail.com)

MIT License

• go-prettytable, it does not support wrapping cells and it's not flexible to add rows that the number of columns is dynamic.
• gotabulate, it supports wrapping cells, but it has to read all data in memory before outputing the result. We followed the configuration of table styles from this package.
• go-pretty, it supports wrapping cells, but it has to read all data in memory before outputing the result. We used some table styles with minor differences in this package.
• table, it renders colorful texts, and supports Multicolumns and nested tables.