module Random::Formatter

Random number formatter. ↑

Formats generated random numbers in many manners. When 'random/formatter' is required, several methods are added to empty core module Random::Formatter, making them available as Random’s instance and module methods.

Standard library SecureRandom is also extended with the module, and the methods described below are available as a module methods in it.

Examples ↑

Generate random hexadecimal strings:

require 'random/formatter'

prng = Random.new
prng.hex(10) #=> "52750b30ffbc7de3b362"
prng.hex(10) #=> "92b15d6c8dc4beb5f559"
prng.hex(13) #=> "39b290146bea6ce975c37cfc23"
# or just
Random.hex #=> "1aed0c631e41be7f77365415541052ee"

Generate random base64 strings:

prng.base64(10) #=> "EcmTPZwWRAozdA=="
prng.base64(10) #=> "KO1nIU+p9DKxGg=="
prng.base64(12) #=> "7kJSM/MzBJI+75j8"
Random.base64(4) #=> "bsQ3fQ=="

Generate random binary strings:

prng.random_bytes(10) #=> "\016\t{\370g\310pbr\301"
prng.random_bytes(10) #=> "\323U\030TO\234\357\020\a\337"
Random.random_bytes(6) #=> "\xA1\xE6Lr\xC43"

Generate alphanumeric strings:

prng.alphanumeric(10) #=> "S8baxMJnPl"
prng.alphanumeric(10) #=> "aOxAg8BAJe"
Random.alphanumeric #=> "TmP9OsJHJLtaZYhP"

Generate UUIDs:

prng.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594"
prng.uuid #=> "bad85eb9-0713-4da7-8d36-07a8e4b00eab"
Random.uuid #=> "f14e0271-de96-45cc-8911-8910292a42cd"

All methods are available in the standard library SecureRandom, too:

SecureRandom.hex #=> "05b45376a30c67238eb93b16499e50cf"

Generate a random number in the given range as Random does

prng.random_number       #=> 0.5816771641321361
prng.random_number(1000) #=> 485
prng.random_number(1..6) #=> 3
prng.rand                #=> 0.5816771641321361
prng.rand(1000)          #=> 485
prng.rand(1..6)          #=> 3