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String.random

06.23.2008

| 3923 views |

class String
  def self.random(length=20)
    chars = ('a'..'z').to_a + ('A'..'Z').to_a + ("0".."9").to_a
    hash = ""; length.times { hash << chars[rand(chars.size)] }; hash
  end
end

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Comments

Snippets Manager replied on Tue, 2008/03/11 - 10:39am

@ChronicStar: I think you win an award there... @fatlotus: Yes, it would probably be better to cache the characters beforehand.

Snippets Manager replied on Fri, 2008/06/27 - 2:54pm

How about this?


class String
  def self.random(length=20)
    @@chars ||= ('a'..'z').to_a + ('A'..'Z').to_a + ("0".."9").to_a
    (1..length).map { @@chars[rand(@@chars.size)] }.to_s
  end
end