Module: Jinx::UID

Defined in:
lib/jinx/helpers/uid.rb

Overview

A unique identifier generator.

Class Method Summary collapse

Class Method Details

.generate ⇒ Object

Returns a relatively unique integer. Successive calls to this method within the same time zone spaced more than a millisecond apart return different integers. Each generated qualifier is greater than the previous by an unspecified amount.



8
9
10
11
12
13
14
15
16
17
 
# File 'lib/jinx/helpers/uid.rb', line 8

def self.generate
  # the first date that this method could be called
  @first ||= Date.new(2011, 12, 01)
  # days as integer + milliseconds as fraction since the first date
  diff = DateTime.now - @first
  # shift a tenth of a milli up into the integer portion
  decimillis = diff * 24 * 60 * 60 * 10000
  # truncate the fraction
  decimillis.truncate
end