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columnify
Advanced tools
Package description
The columnify npm package is a utility that allows for formatting console output into a columnar data format. It is particularly useful for creating readable tables out of JSON data or arrays of objects. With columnify, you can easily align text in columns, customize column widths, and manage how text wraps within columns.
Basic Column Formatting
This feature allows for the simple transformation of an array of objects into a neatly formatted table. Each object property becomes a column.
const columnify = require('columnify')
const data = [{ name: 'John', age: 22 }, { name: 'Jane', age: 33 }]
console.log(columnify(data))
Custom Column Widths
This feature enables the customization of column widths, allowing for a uniform appearance or to accommodate longer text without breaking the layout.
const columnify = require('columnify')
const data = [{ name: 'John', age: 22 }, { name: 'Jane', age: 33 }]
console.log(columnify(data, { minWidth: 20 }))
Column Alignment
This feature allows for the alignment of text within columns. In this example, the 'age' column is right-aligned, enhancing the readability of numerical data.
const columnify = require('columnify')
const data = [{ name: 'John', age: 22, location: 'New York' }, { name: 'Jane', age: 33, location: 'California' }]
console.log(columnify(data, { config: { age: { align: 'right' } } }))
cli-table is a similar package that provides functionalities for rendering unicode-aided tables on the command line. Compared to columnify, cli-table offers more customization options for borders and styles but might require more setup for simple tasks.
The 'table' package is another alternative that allows for creating text-based tables with customizable padding, margin, and border styles. It supports content wrapping and column width management similar to columnify but with additional features like text truncation and alignment.
Readme
Create text-based columns suitable for console output from objects or arrays of objects.
Columns are automatically resized to fit the content of the largest cell. Each cell will be padded with spaces to fill the available space and ensure column contents are left-aligned.
Designed to handle sensible wrapping in npm search results.
npm search
before & after integrating columnify:
$ npm install --save columnify@latest
var columnify = require('columnify')
var columns = columnify(data, options)
console.log(columns)
Objects are converted to a list of key/value pairs:
var data = {
"commander@0.6.1": 1,
"minimatch@0.2.14": 3,
"mkdirp@0.3.5": 2,
"sigmund@1.0.0": 3
}
console.log(columnify(data))
KEY VALUE
commander@0.6.1 1
minimatch@0.2.14 3
mkdirp@0.3.5 2
sigmund@1.0.0 3
var data = {
"commander@0.6.1": 1,
"minimatch@0.2.14": 3,
"mkdirp@0.3.5": 2,
"sigmund@1.0.0": 3
}
console.log(columnify(data, {columns: ['MODULE', 'COUNT']}))
MODULE COUNT
commander@0.6.1 1
minimatch@0.2.14 3
mkdirp@0.3.5 2
sigmund@1.0.0 3
Column headings are extracted from the keys in supplied objects.
var columnify = require('columnify')
var columns = columnify([{
name: 'mod1',
version: '0.0.1'
}, {
name: 'module2',
version: '0.2.0'
}])
console.log(columns)
NAME VERSION
mod1 0.0.1
module2 0.2.0
You can define the maximum width before wrapping for individual cells in columns. Minimum width is also supported. Wrapping will happen at word boundaries. Empty cells or those which do not fill the max/min width will be padded with spaces.
var columns = columnify([{
name: 'mod1',
description: 'some description which happens to be far larger than the max',
version: '0.0.1',
}, {
name: 'module-two',
description: 'another description larger than the max',
version: '0.2.0',
})
console.log(columns)
NAME DESCRIPTION VERSION
mod1 some description which happens 0.0.1
to be far larger than the max
module-two another description larger 0.2.0
than the max
You can disable wrapping and instead truncate content at the maximum
column width. Truncation respects word boundaries. A truncation marker,
…
will appear next to the last word in any truncated line.
var columns = columnify(data, {
truncate: true,
config: {
description: {
maxWidth: 20
}
}
})
console.log(columns)
NAME DESCRIPTION VERSION
mod1 some description… 0.0.1
module-two another description… 0.2.0
By default, all properties are converted into columns, whether or not they exist on every object or not.
To explicitly specify which columns to include, and in which order, supply a "columns" or "include" array ("include" is just an alias).
var data = [{
name: 'module1',
description: 'some description',
version: '0.0.1',
}, {
name: 'module2',
description: 'another description',
version: '0.2.0',
}]
var columns = columnify(data, {
columns: ['name', 'version'] // note description not included
})
console.log(columns)
NAME VERSION
module1 0.0.1
module2 0.2.0
By default, columnify
sanitises text by replacing any occurance of 1 or more whitespace characters with a single space.
columnify
can be configured to respect existing new line characters using the preserveNewLines
option. Note this will still collapse all other whitespace.
var data = [{
name: "glob@3.2.9",
paths: [
"node_modules/tap/node_modules/glob",
"node_modules/tape/node_modules/glob"
].join('\n')
}, {
name: "nopt@2.2.1",
paths: [
"node_modules/tap/node_modules/nopt"
]
}, {
name: "runforcover@0.0.2",
paths: "node_modules/tap/node_modules/runforcover"
}]
console.log(columnify(data, {preserveNewLines: true}))
NAME PATHS
glob@3.2.9 node_modules/tap/node_modules/glob
node_modules/tape/node_modules/glob
nopt@2.2.1 node_modules/tap/node_modules/nopt
runforcover@0.0.2 node_modules/tap/node_modules/runforcover
Compare this with output without preserveNewLines
:
console.log(columnify(data, {preserveNewLines: false}))
// or just
console.log(columnify(data))
NAME PATHS
glob@3.2.9 node_modules/tap/node_modules/glob node_modules/tape/node_modules/glob
nopt@2.2.1 node_modules/tap/node_modules/nopt
runforcover@0.0.2 node_modules/tap/node_modules/runforcover
You can change the truncation marker to something other than the default
…
.
var columns = columnify(data, {
truncate: true,
truncateMarker: '>',
widths: {
description: {
maxWidth: 20
}
}
})
console.log(columns)
NAME DESCRIPTION VERSION
mod1 some description> 0.0.1
module-two another description> 0.2.0
If your columns need some bling, you can split columns with custom characters.
var columns = columnify(data, {
columnSplitter: ' | '
})
console.log(columns)
NAME | DESCRIPTION | VERSION
mod1 | some description which happens to be far larger than the max | 0.0.1
module-two | another description larger than the max | 0.2.0
columnify
uses mycoboco/wcwidth.js to calculate length of multibyte characters:
var data = [{
name: 'module-one',
description: 'some description',
version: '0.0.1',
}, {
name: '这是一个很长的名字的模块',
description: '这真的是一个描述的内容这个描述很长',
version: "0.3.3"
}]
console.log(columnify(data))
i.e. before columnify added this feature
NAME DESCRIPTION VERSION
module-one some description 0.0.1
这是一个很长的名字的模块 这真的是一个描述的内容这个描述很长 0.3.3
NAME DESCRIPTION VERSION
module-one some description 0.0.1
这是一个很长的名字的模块 这真的是一个描述的内容这个描述很长 0.3.3
MIT
FAQs
Unknown package
We found that columnify demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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