Module: TZInfo::OffsetRationals

Defined in:

lib/tzinfo/offset_rationals.rb

Overview

Provides a method for getting Rationals for a timezone offset in seconds. Pre-reduced rationals are returned for all the half-hour intervals between -14 and +14 hours to avoid having to call gcd at runtime.

Constant Summary

@@rational_cache =

:nodoc:

{
      -50400 => Rational.send(:new!, -7,12), 
      -48600 => Rational.send(:new!, -9,16),
      -46800 => Rational.send(:new!, -13,24),
      -45000 => Rational.send(:new!, -25,48),
      -43200 => Rational.send(:new!, -1,2),
      -41400 => Rational.send(:new!, -23,48),
      -39600 => Rational.send(:new!, -11,24),
      -37800 => Rational.send(:new!, -7,16),
      -36000 => Rational.send(:new!, -5,12),
      -34200 => Rational.send(:new!, -19,48),
      -32400 => Rational.send(:new!, -3,8),
      -30600 => Rational.send(:new!, -17,48),
      -28800 => Rational.send(:new!, -1,3),
      -27000 => Rational.send(:new!, -5,16),
      -25200 => Rational.send(:new!, -7,24),
      -23400 => Rational.send(:new!, -13,48),
      -21600 => Rational.send(:new!, -1,4),
      -19800 => Rational.send(:new!, -11,48),
      -18000 => Rational.send(:new!, -5,24),
      -16200 => Rational.send(:new!, -3,16),
      -14400 => Rational.send(:new!, -1,6),
      -12600 => Rational.send(:new!, -7,48),
      -10800 => Rational.send(:new!, -1,8),
-9000 => Rational.send(:new!, -5,48),
-7200 => Rational.send(:new!, -1,12),
-5400 => Rational.send(:new!, -1,16),
-3600 => Rational.send(:new!, -1,24),
-1800 => Rational.send(:new!, -1,48),
    0 => Rational.send(:new!, 0,1),
 1800 => Rational.send(:new!, 1,48),
 3600 => Rational.send(:new!, 1,24),
 5400 => Rational.send(:new!, 1,16),
 7200 => Rational.send(:new!, 1,12),
 9000 => Rational.send(:new!, 5,48),
10800 => Rational.send(:new!, 1,8),
12600 => Rational.send(:new!, 7,48),
14400 => Rational.send(:new!, 1,6),
16200 => Rational.send(:new!, 3,16),
18000 => Rational.send(:new!, 5,24),
19800 => Rational.send(:new!, 11,48),
21600 => Rational.send(:new!, 1,4),
23400 => Rational.send(:new!, 13,48),
25200 => Rational.send(:new!, 7,24),
27000 => Rational.send(:new!, 5,16),
28800 => Rational.send(:new!, 1,3),
30600 => Rational.send(:new!, 17,48),
32400 => Rational.send(:new!, 3,8),
34200 => Rational.send(:new!, 19,48),
36000 => Rational.send(:new!, 5,12),
37800 => Rational.send(:new!, 7,16),
39600 => Rational.send(:new!, 11,24),
41400 => Rational.send(:new!, 23,48),
43200 => Rational.send(:new!, 1,2),
45000 => Rational.send(:new!, 25,48),
46800 => Rational.send(:new!, 13,24),  
48600 => Rational.send(:new!, 9,16),            
50400 => Rational.send(:new!, 7,12)}

Class Method Summary

• .rational_for_offset(offset) ⇒ Object

  Returns a Rational expressing the fraction of a day that offset in seconds represents (i.e. equivalent to Rational(offset, 86400)).

Class Method Details

.rational_for_offset(offset) ⇒ Object

Returns a Rational expressing the fraction of a day that offset in seconds represents (i.e. equivalent to Rational(offset, 86400)).

# File 'lib/tzinfo/offset_rationals.rb', line 90

def rational_for_offset(offset)
  @@rational_cache[offset] || Rational(offset, 86400)      
end