casual

What is casual?

The casual npm package is a versatile library for generating random data. It can be used to create fake data for testing, prototyping, and development purposes. The package offers a wide range of functionalities, including generating random strings, numbers, dates, addresses, and more.

What are casual's main functionalities?

Random String Generation

Generates a random string. This can be useful for creating random usernames, passwords, or other text data.

const casual = require('casual');
console.log(casual.string);

Random Number Generation

Generates a random integer between the specified range. This is useful for creating random IDs, quantities, or other numerical data.

const casual = require('casual');
console.log(casual.integer(1, 100));

Random Date Generation

Generates a random date in the specified format. This can be useful for creating random timestamps, birthdates, or other date-related data.

const casual = require('casual');
console.log(casual.date('YYYY-MM-DD'));

Random Address Generation

Generates a random address. This can be useful for creating random location data for testing or development purposes.

const casual = require('casual');
console.log(casual.address);

Random Email Generation

Generates a random email address. This can be useful for creating random user data for testing or development purposes.

const casual = require('casual');
console.log(casual.email);

Other packages similar to casual

faker

Faker is a popular library for generating fake data. It offers a wide range of functionalities similar to casual, including generating random names, addresses, dates, and more. Faker is known for its extensive localization support, allowing users to generate data in various languages and formats.

chance

Chance is another library for generating random data. It provides a comprehensive set of functionalities, including random string, number, date, and address generation. Chance is known for its simplicity and ease of use, making it a good alternative to casual for basic random data generation needs.

random-js

Random-js is a library focused on generating random numbers and other random data. It offers a variety of random number generation methods, including uniform, normal, and exponential distributions. While it may not have as many features as casual, it excels in providing high-quality random number generation.

README

Fake data generator

Installation

npm install casual

Usage

var casual = require('casual');

// Generate random sentence
// You don't need function call operator here
// because most of generators use properties mechanism
var sentence = casual.sentence;

// Generate random city name
var city = casual.city;

// Define custom generator
casual.define('point', function() {
	return {
		x: Math.random(),
		y: Math.random()
	};
});

// Generate random point
var point = casual.point;

// And so on..

Casual uses javascript properties for common generators so you don't need to use function call operator

Embedded generators

// Address

casual.country          // 'United Kingdom'
casual.city             // 'New Ortiz chester'
casual.zip              // '26995'
casual.street           // 'Jadyn Islands'
casual.address          // '6390 Tremblay Pines Suite 784'
casual.address1         // '8417 Veda Circles'
casual.address2         // 'Suite 648'
casual.state            // 'Michigan'
casual.state_abbr       // 'CO'
casual.latitude         // 90.0610
casual.longitude        // 180.0778
casual.building_number  // 2413

// Text

casual.sentence               // 'Laborum eius porro consequatur.'
casual.sentences(n = 3)       // 'Dolorum fuga nobis sit natus consequatur. Laboriosam sapiente. Natus quos ut.'
casual.title                  // 'Systematic nobis'
casual.text                   // 'Nemo tempore natus non accusamus eos placeat nesciunt. et fugit ut odio nisi dolore non ... (long text)'
casual.description            // 'Vel et rerum nostrum quia. Dolorum fuga nobis sit natus consequatur.'
casual.short_description      // 'Qui iste similique iusto.'
casual.string                 // 'saepe quia molestias voluptates et'
casual.word                   // 'voluptatem'
casual.words(n = 7)           // 'sed quis ut beatae id adipisci aut'
casual.array_of_words(n = 7)  // [ 'voluptas', 'atque', 'vitae', 'vel', 'dolor', 'saepe', 'ut' ]
casual.letter                 // 'k'

// Internet

casual.ip      // '21.44.122.149'
casual.domain  // 'darrion.us'
casual.url     // 'germaine.net'
casual.email   // '[e-mail]'

// Person

casual.name            // 'Alberto'
casual.username        // 'Darryl'
casual.first_name      // 'Derek'
casual.last_name       // 'Considine'
casual.full_name       // 'Kadin Torphy'
casual.password        // '[phone]Schumm'
casual.name_prefix     // 'Miss'
casual.name_suffix     // 'Jr.'
casual.company_name    // 'Cole, Wuckert and Strosin'
casual.company_suffix  // 'Inc'
casual.catch_phrase    // 'Synchronised optimal concept'
casual.phone           // '380 82 790 25 92'

// Numbers

casual.random                            // 0.7171590146608651 (core generator)
casual.integer(from = -1000, to = 1000)  // 632
casual.double(from = -1000, to = 1000)   // -234.12987444
casual.array_of_digits(n = 7)            // [ 4, 8, 3, 1, 7, 6, 6 ]
casual.array_of_integers(n = 7)          // [ -105, -7, -532, -596, -430, -957, -234 ]
casual.array_of_doubles(n = 7)           // [ -866.3755785673857, -166.62194719538093, ...]

// Date

casual.unix_time                    // 659897901
casual.moment                       // moment.js object see http://momentjs.com/docs/
casual.date(format = 'YYYY-MM-DD')  // '2001-07-06' (see available formatters http://momentjs.com/docs/#/parsing/string-format/)
casual.time(format = 'HH:mm:ss')    // '03:08:02' (see available formatters http://momentjs.com/docs/#/parsing/string-format/)
casual.century                      // 'IV'
casual.am_pm                        // 'am'
casual.day_of_year                  // 323
casual.day_of_month                 // 9
casual.day_of_week                  // 4
casual.month_number                 // 9
casual.month_name                   // 'March'
casual.year                         // 1990
casual.timezone                     // 'America/Miquelon'

// Payments

casual.card_type            // 'American Express'
casual.card_number(vendor)  // '4716506247152101' (if no vendor specified then random)
casual.card_exp             // '03/04'
casual.card_data            // { type: 'MasterCard', number: '5307558778577046', exp: '04/88', holder_name: 'Jaron Gibson' }

// Misc

casual.country_code    // 'ES'
casual.language_code   // 'ru'
casual.locale          // 'hi_IN'
casual.mime_type       // 'audio/mpeg'
casual.file_extension  // 'rtf'

// Colors

casual.color_name       // 'DarkOliveGreen'
casual.safe_color_name  // 'maroon'
casual.rgb_hex          // '#2e4e1f'
casual.rgb_array        // [ 194, 193, 166 ]

Define custom generators

casual.define('user', function() {
	return {
		email: casual.email,
		firstname: casual.first_name,
		lastname: casual.last_name,
		password: casual.password
	};
});

// Generate object with randomly generated fields
var user = casual.user;

If you want to pass some params to your generator:

casual.define('profile', function(type) {
	return {
		title: casual.title,
		description: casual.description,
		type: type || 'private'
	};
});

// Generate object with random data
var profile = casual.profile('public');

NOTE: if getter function has non-empty arguments list then generator should be called as function casual.profile('public'), otherwise it should be accessed as property casual.profile.

Localization

You can get localized version of casual generator:

var casual = require('casual').ru_RU;
casual.street; // 'Бухарестская'

Default locale is en_US.

See src/providers/{{locale}} for more details about available locales and locale specific generators.

If you don't find necessary locale, please create an issue or just add it :)

Helpers

random_element

Get random array element

var item = casual.random_element(['ball', 'clock', 'table']);

random_value

Extract random object value

var val = casual.random_value({ a: 1, b: 3, c: 42 });
// val will be equal 1 or 3 or 42

random_key

Extract random object key

var val = casual.random_key({ a: 1, b: 3, c: 42 });
// val will be equal 'a' or 'b' or 'c'

populate

Replace placeholders with generators results

casual.populate('{{email}} {{first_name}}');
// '[e-mail] Lyla'

populate_one_of

Pick random element from given array and populate it

var formats = ['{{first_name}}', '{{last_name}} {{city}}'];
casual.populate_one_of(formats);

// Same as

casual.populate(casual.random_element(formats));

numerify

Replace all # in string with digits

var format = '(##)-00-###-##';
casual.numerify(format); // '(10)-00-843-32'

define

See custom generators

register_provider

Register generators provider

var words = ['flexible', 'great', 'ok', 'good'];
var doge_provider = {
	such: function() {
		return 'such ' + casual.random_element(words);
	},

	doge_phrase: function() {
		return 'wow ' + provider.such();
	}
};

casual.register_provider(doge_provider);

casual.such;        // 'such good'
casual.doge_phrase; // 'wow such flexible'

Seeding

If you want to use a specific seed in order to get a repeatable random sequence:

casual.seed(123);

It uses Mersenne Twister pseudorandom number generator in core.

Generators functions

If you want to pass generator as a callback somewhere or just hate properties you always can access generator function at casual._{generator}

// Generate value using function
var title = casual._title();
// Same as
var title = casual.title;

// Pass generator as callback
var array_of = function(times, generator) {
	var result = [];

	for (var i = 0; i < times; ++i) {
		result.push(generator());
	}

	return result;
};

// Will generate array of five random timestamps
var array_of_timestamps = array_of(5, casual._unix_time);

Or you can get functional version of casual generator:

var casual = require('casual').functions();

// Generate title
casual.title();

// Generate timestamp
casual.unix_time();

View providers output cli

There is a simple cli util which could be used to view/debug providers output:

# Will render table with columns [generator_name, result] for all providers
node utils/show.js

 # Will render table with columns [generator_name, result] only for person provider
node utils/show.js person

Contributing

• Adding new locale

License

Heavily inspired by https://github.com/fzaninotto/Faker

The MIT License (MIT) Copyright (c) 2014 Egor Gumenyuk [e-mail]

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.