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The easy-table npm package is a simple and flexible library for creating and formatting text tables in Node.js. It allows you to easily create tables, format columns, and perform various operations on table data.
Creating a Simple Table
This feature allows you to create a simple table from an array of objects. Each object represents a row in the table, and the properties of the objects are the columns.
const Table = require('easy-table');
let data = [
{ name: 'John', age: 25, city: 'New York' },
{ name: 'Jane', age: 30, city: 'San Francisco' },
{ name: 'Mike', age: 27, city: 'Chicago' }
];
let t = new Table;
data.forEach(function(person) {
t.cell('Name', person.name);
t.cell('Age', person.age);
t.cell('City', person.city);
t.newRow();
});
console.log(t.toString());
Formatting Columns
This feature allows you to format columns in the table. In this example, the 'Age' column is formatted as a number with no decimal places.
const Table = require('easy-table');
let data = [
{ name: 'John', age: 25, city: 'New York' },
{ name: 'Jane', age: 30, city: 'San Francisco' },
{ name: 'Mike', age: 27, city: 'Chicago' }
];
let t = new Table;
data.forEach(function(person) {
t.cell('Name', person.name);
t.cell('Age', person.age, Table.number(0));
t.cell('City', person.city);
t.newRow();
});
console.log(t.toString());
Sorting Rows
This feature allows you to sort the rows in the table. In this example, the rows are sorted by the 'Age' column in descending order.
const Table = require('easy-table');
let data = [
{ name: 'John', age: 25, city: 'New York' },
{ name: 'Jane', age: 30, city: 'San Francisco' },
{ name: 'Mike', age: 27, city: 'Chicago' }
];
let t = new Table;
data.forEach(function(person) {
t.cell('Name', person.name);
t.cell('Age', person.age);
t.cell('City', person.city);
t.newRow();
});
t.sort(['Age|des']);
console.log(t.toString());
cli-table is another popular package for creating text-based tables in Node.js. It offers more customization options for table borders and styles compared to easy-table, but it may be slightly more complex to use.
The table package provides a more feature-rich and flexible way to create tables in Node.js. It supports various table styles, alignment options, and even table cell spanning. It is more powerful but also more complex than easy-table.
ascii-table is a lightweight package for creating ASCII tables in Node.js. It is simpler and less feature-rich compared to easy-table, making it suitable for basic table creation needs.
Nice utility for rendering text tables with javascript.
var Table = require('easy-table')
var data = [
{ id: 123123, desc: 'Something awesome', price: 1000.00 },
{ id: 245452, desc: 'Very interesting book', price: 11.45},
{ id: 232323, desc: 'Yet another product', price: 555.55 }
]
var t = new Table
data.forEach(function(product) {
t.cell('Product Id', product.id)
t.cell('Description', product.desc)
t.cell('Price, USD', product.price, Table.number(2))
t.newRow()
})
console.log(t.toString())
The script above will render:
Product Id Description Price, USD
---------- --------------------- ----------
123123 Something awesome 1000.00
245452 Very interesting book 11.45
232323 Yet another product 555.55
t.printTransposed()
returns
Product Id : 245452 : 232323 : 123123
Description : Very interesting book : Yet another product : Something awesome
Price, USD : 11.45 : 555.55 : 1000.00
t.print()
shows just rows you pushed and nothing more
123123 Something awesome 1000.00
245452 Very interesting book 11.45
232323 Yet another product 555.55
The full signature of .cell()
is:
t.cell(column, value, printer)
Rendering occures in two phases. At the first phase printer
is called to get the minimal width required to fit the cell content.
At the second phase printer
is called again with
additional width
parameter to get actual string to render.
For example, here is how currency printer might be defined
function currency(val, width) {
var str = val.toFixed(2)
return width ? Table.padLeft(str, width) : str
}
When you already have an array, explicit table instantiation and iteration
becomes an overhead. For such cases it is convenient to use Table.print()
.
console.log(Table.print(data))
id desc price
------ --------------------- ------
123123 Something awesome 1000
245452 Very interesting book 11.45
232323 Yet another product 555.55
It is possible to pass some options
Table.print(data, {
desc: {name: 'description'}
price: {printer: Table.number(2)}
})
id description price
------ --------------------- -------
123123 Something awesome 1000.00
245452 Very interesting book 11.45
232323 Yet another product 555.55
or have a full control over rendering
Table.print(data, function(item, cell) {
cell('Product id', item.id)
cell('Price, USD', item.price)
}, function(table) {
return table.print()
})
Table.print()
also accepts objects
Table.print(data[0])
id : 123123
desc : Something awesome
price : 1000
You can sort a table by calling .sort()
, and optionally passing in a list of
column names to sort on (by default uses all columns), or a custom comparator
function. It is also possible to specify the sort order. For example:
t.sort(['Price, USD|des']) // will sort in descending order
t.sort(['Price, USD|asc']) // will sort in ascending order
t.sort(['Price, USD']) // sorts in ascending order by default
Easy table can help to calculate and render totals:
t.total('Price, USD')
Product Id Description Price, USD
---------- --------------------- ----------
245452 Very interesting book 11.45
232323 Yet another product 555.55
123123 Something awesome 1000.00
---------- --------------------- ----------
1567.00
Here is a more elaborate example
t.total('Price, USD', {
printer: Table.aggr.printer('Avg: ', currency),
reduce: Table.aggr.avg,
init: 0
})
// or alternatively
t.total('Price, USD', {
printer: function(val, width) {
return padLeft('Avg: ' + currency(val), width)
},
reduce: function(acc, val, idx, len) {
acc = acc + val
return idx + 1 == len ? acc/len : acc
}
})
Product Id Description Price, USD
---------- --------------------- -----------
245452 Very interesting book 11.45
232323 Yet another product 555.55
123123 Something awesome 1000.00
---------- --------------------- -----------
Avg: 522.33
via npm
$ npm install easy-table
(The MIT License)
Copyright (c) 2015 Eldar Gabdullin eldargab@gmail.com
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
Nice text table for the CLI
The npm package easy-table receives a total of 1,613,790 weekly downloads. As such, easy-table popularity was classified as popular.
We found that easy-table 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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