Generate repeatable random data in JS

Inspired by Faker.js Uses slightly modified Alea PRNG

For the server, install Blarney via npm.

npm install Blarney

For the browser, download Blarney.js, and include it as a script tag.

<script src="Blarney.js"></script>
<script>
  var ns = new Blarney();
  ns.integer(); // Random integer between 0 and 2^32
</script>

To create a new Blarney instance, do var ns = new Blarney();. You can pass any number of arbitrary arguments to the Blarney() constructor to be used as seed data. If you don't pass anything, it will just use the default.

If you want to reset the seed of an instance you already have, call ns.sow() and pass in the seed data you want to use. The constructor calls sow() internally on instantiation.

• integer() - returns a random integer between 0 and 2^32
• frac() - returns a random real number between 0 and 1
• real() - returns a random real number between 0 and 2^32
• integerInRange(min, max) - returns a random integer between min and max
• realInRange(min, max) - returns a random real number between min and max
• normal() - returns a random real number between -1 and 1

• uuid() - returns a valid v4 UUID hex string
• pick(array) - returns a random member of array
• weightedPick(array) - returns a random member of array, favoring the earlier entries
• timestamp(min, max) - returns a random timestamp between min and max, or between the beginning of 2000 and the end of 2020 if min and max aren't specified

• word() - returns a random word of lipsum
• words(n) - returns n random words of lipsum, 3 if not specified
• sentence() - returns a random lipsum sentence
• sentences(n) - returns n random lipsum sentences, 3 if not specified

• gender() - returns 'male' or 'female'
• firstName(gender) - returns a random common first name, gender is optional
• lastName() - returns a random common last name
• name(gender) - returns a random first and last name, gender is optional
• portrait(gender) - returns an object containing Flickr short URLs for four images. Keys are smallSquare, largeSquare, thumbnail, and small. The photos are from GregPC's 1000faces1 set on Flickr. Special thanks to him for doing all the hard work and allowing us to benefit from it!
• jobTitle() - returns a random job title
• email() - returns a random email address

• buzzPhrase() - returns a random web 2.0 business plan...
• domain() - returns a random domain name

Do whatever you want with this code. The consequences of your actions are your own responsibility.