Module: TZInfo::OffsetRationals

Defined in:
lib/active_support/vendor/tzinfo-0.3.8/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 collapse

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

Class Method Summary collapse

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)).


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# File 'lib/active_support/vendor/tzinfo-0.3.8/tzinfo/offset_rationals.rb', line 90

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