| # as-table |
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| [](https://travis-ci.org/xpl/as-table) [](https://coveralls.io/github/xpl/as-table) [](https://npmjs.com/package/as-table) [](https://david-dm.org/xpl/as-table) [](https://scrutinizer-ci.com/g/xpl/as-table/?branch=master) |
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| A simple function that print objects and arrays as ASCII tables. Supports ANSI styling and weird 💩 Unicode emoji symbols (they won't break the layout), thanks to [`printable-characters`](https://github.com/xpl/printable-characters). |
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| ```bash |
| npm install as-table |
| ``` |
|
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| ## Printing objects |
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| ```javascript |
| asTable = require ('as-table') |
| |
| asTable ([ { foo: true, string: 'abcde', num: 42 }, |
| { foo: false, string: 'qwertyuiop', num: 43 }, |
| { string: null, num: 44 } ]) |
| ``` |
| ``` |
| foo string num |
| ---------------------- |
| true abcde 42 |
| false qwertyuiop 43 |
| null 44 |
| ``` |
|
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| ## Printing arrays |
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| ```javascript |
| asTable ([['qwe', '123456789', 'zxcvbnm'], |
| ['qwerty', '12', 'zxcvb'], |
| ['qwertyiop', '1234567', 'z']]) |
| ``` |
| ``` |
| qwe 123456789 zxcvbnm |
| qwerty 12 zxcvb |
| qwertyiop 1234567 z |
| ``` |
|
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| ## Limiting total width by proportionally trimming cells + setting columns delimiter |
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| ```javascript |
| asTable.configure ({ maxTotalWidth: 22, delimiter: ' | ' }) (data) |
| ``` |
| ``` |
| qwe | 1234… | zxc… |
| qwer… | 12 | zxc… |
| qwer… | 1234… | z |
| ``` |
|
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| ## Right align |
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| ```javascript |
| asTable.configure ({ right: true }) (data) |
| ``` |
| ``` |
| foo bar baz |
| ----------------------------- |
| qwe 123456789 zxcvbnm |
| qwerty 12 zxcvb |
| qwertyiop 1234567 z |
| ``` |
|
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| ## Providing a custom object printer |
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| ```javascript |
| asTable.configure ({ print: x => (typeof x === 'boolean') ? (x ? 'yes' : 'no') : String (x) }) (data) |
| ``` |
| ``` |
| foo string num |
| -------------------- |
| yes abcde 42 |
| no qwertyuiop 43 |
| null 44 |
| ``` |
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| The callback also receives a field name (in case of objects) or a column index (in case of arrays): |
|
|
| ```javascript |
| asTable = require ('as-table').configure ({ |
| print (x, k) { |
| if (k === 'timestamp') return new Date (x).toGMTString() |
| return String (x) |
| } |
| }) |
| |
| asTable ([ { name: 'A', timestamp: 1561202591572 }, |
| { name: 'B', timestamp: 1558524240034 } ]) |
| ``` |
|
|
| ## Obtaining a pre-configured function |
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| ```javascript |
| asTable = require ('as-table').configure ({ maxTotalWidth: 25, delimiter: ' | ' }) |
| |
| asTable (data) |
| ``` |
|
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| ## Customizing the title rendering and the header separator |
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| With string coloring by [`ansicolor`](https://github.com/xpl/ansicolor) (just for the demo purposes, any library will fit): |
|
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| ```javascript |
| asTable = require ('as-table').configure ({ title: x => x.bright, delimiter: ' | '.dim.cyan, dash: '-'.bright.cyan }) |
| |
| console.log ( |
| asTable ([ { foo: true, string: 'abcde', num: 42 }, |
| { foo: false, string: 'qwertyuiop'.bgMagenta.green.bright, num: 43 } ]) |
| ``` |
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| <img width="179" alt="screen shot 2017-07-21 at 23 46 14" src="https://user-images.githubusercontent.com/1707/28481945-dcb0f8d6-6e6e-11e7-896e-dfad40662daf.png"> |
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