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cond |
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time |
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package Date::Lectionary::Time; |
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242890
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use v5.22; |
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use strict; |
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use warnings; |
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use Exporter::Easy ( OK => [qw(nextSunday prevSunday closestSunday)], ); |
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4189
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use Carp; |
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use Try::Tiny; |
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491
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use Time::Piece; |
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use Time::Seconds; |
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1805
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=head1 NAME |
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Date::Lectionary::Time - Find your way in time relative to Sundays. |
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=head1 VERSION |
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Version 1.20161222 |
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=cut |
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our $VERSION = '1.20161222'; |
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=head1 SYNOPSIS |
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Working in the liturgical time of the lectionary means tracking time relative to Sundays. This is a quick utility to find the next, previous, or the closest Sunday to a given date. |
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use Time::Piece; |
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use Date::Lectionary::Time qw(nextSunday prevSunday closestSunday); |
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my $christmasDay = Time::Piece->strptime("2015-12-25", "%Y-%m-%d"); |
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my $sundayAfterChristmas = nextSunday($christmasDay); |
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my $sundayBeforeChristmas = prevSunday($christmasDay); |
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my $sundayClosestToChristmas = closestSunday($christmasDay); |
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=head1 EXPORTS |
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40
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nextSunday |
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prevSunday |
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44
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closestSunday |
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46
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use Date::Lectionary::Time qw(nextSunday prevSunday closestSunday); |
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=head1 SUBROUTINES/METHODS |
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50
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=head2 nextSunday |
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52
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For a given Time::Piece date returns a Time::Piece object of the date of the Sunday immediately following the given date. |
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54
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=cut |
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56
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sub nextSunday { |
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11
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11
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1
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88593
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my ( $class, @params ) = @_; |
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66
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103
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my $date = $params[0] // $class; |
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110
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my $nextSunday = undef; |
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61
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11
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100
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if ( !length $date ) { |
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1
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15
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croak |
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"Method [nextSunday] expects an input argument of type Time::Piece. The given type could not be determined."; |
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} |
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66
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10
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100
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102
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if ( $date->isa('Time::Piece') ) { |
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try { |
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9
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421
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my $daysToAdd = 7 - $date->_wday; |
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9
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31
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my $secondsToAdd = $daysToAdd * ONE_DAY; |
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9
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33
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$nextSunday = $date + $secondsToAdd; |
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} |
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catch { |
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0
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croak "Could not calculate the next Sunday after $date."; |
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9
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52
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}; |
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} |
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else { |
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1
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22
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croak |
78
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"Method [nextSunday] expects an input argument of type Time::Piece."; |
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} |
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81
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9
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448
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return $nextSunday; |
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} |
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84
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=head2 prevSunday |
85
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86
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For a given Time::Piece date returns a Time::Piece object of the date of the Sunday immediately before the given date. |
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88
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=cut |
89
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90
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sub prevSunday { |
91
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11
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11
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1
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86546
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my ( $class, @params ) = @_; |
92
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11
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66
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97
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my $date = $params[0] // $class; |
93
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11
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110
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my $prevSunday = undef; |
94
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95
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11
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100
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18
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if ( !length $date ) { |
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1
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8
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croak |
97
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"Method [prevSunday] expects an input argument of type Time::Piece. The given type could not be determined."; |
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} |
99
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100
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10
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100
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98
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if ( $date->isa('Time::Piece') ) { |
101
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try { |
102
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9
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9
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399
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my $daysToSubtract = $date->_wday; |
103
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9
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100
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46
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if ( $daysToSubtract == 0 ) { $daysToSubtract = 7; } |
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2
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3
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104
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9
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11
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my $secondsToSubtract = $daysToSubtract * ONE_DAY; |
105
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9
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22
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$prevSunday = $date - $secondsToSubtract; |
106
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} |
107
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catch { |
108
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0
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0
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0
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carp "Could not calculate the previous Sunday before $date."; |
109
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9
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56
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}; |
110
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} |
111
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else { |
112
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1
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17
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croak |
113
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"Method [prevSunday] expects an input argument of type Time::Piece."; |
114
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} |
115
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116
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9
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447
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return $prevSunday; |
117
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} |
118
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119
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=head2 closestSunday |
120
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121
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For a given Time::Piece date returns a Time::Piece object of the date of the Sunday closest to the given date. |
122
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123
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=cut |
124
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125
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sub closestSunday { |
126
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4
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4
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1
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85100
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my ( $class, @params ) = @_; |
127
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4
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33
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70
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my $date = $params[0] // $class; |
128
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4
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54
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my $closestSunday = undef; |
129
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130
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4
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50
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8
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if ( !length $date ) { |
131
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0
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0
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croak |
132
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"Method [closestSunday] expects an input argument of type Time::Piece. The given type could not be determined."; |
133
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} |
134
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135
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4
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50
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46
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if ( $date->isa('Time::Piece') ) { |
136
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try { |
137
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4
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4
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197
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my $nextSunday = nextSunday($date); |
138
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4
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8
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my $prevSunday = prevSunday($date); |
139
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140
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4
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5
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my ( $dif1, $dif2 ); |
141
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142
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4
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8
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$dif1 = abs( $date - $nextSunday ); |
143
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4
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185
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$dif2 = abs( $prevSunday - $date ); |
144
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145
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4
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100
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109
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if ( $dif1 < $dif2 ) { |
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100
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146
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2
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26
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$closestSunday = $nextSunday; |
147
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} |
148
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elsif ( $dif1 == $dif2 ) { |
149
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1
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20
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$closestSunday = $date; |
150
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} |
151
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else { |
152
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1
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20
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$closestSunday = $prevSunday; |
153
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} |
154
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} |
155
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catch { |
156
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0
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0
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0
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carp "Could not calculate the Sunday closest to $date."; |
157
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4
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24
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}; |
158
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} |
159
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else { |
160
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0
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0
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croak |
161
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"Method [closestSunday] expects an input argument of type Time::Piece."; |
162
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} |
163
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164
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4
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45
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return $closestSunday; |
165
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} |
166
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167
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=head1 AUTHOR |
168
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169
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Michael Wayne Arnold, C<< >> |
170
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171
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=head1 BUGS |
172
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173
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Please report any bugs or feature requests to C, or through |
174
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the web interface at L. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. |
175
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176
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=head1 SUPPORT |
177
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178
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You can find documentation for this module with the perldoc command. |
179
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180
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perldoc Date::Lectionary::Time |
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182
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The development of this module is hosted on GitHub -- L -- and tested via TravisCI. |
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184
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=for html |
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186
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=for html |
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188
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You can also look for information at: |
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190
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=over 4 |
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192
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=item * RT: CPAN's request tracker (report bugs here) |
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194
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L |
195
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196
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=item * AnnoCPAN: Annotated CPAN documentation |
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198
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L |
199
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200
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=item * CPAN Ratings |
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202
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L |
203
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204
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=item * Search CPAN |
205
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206
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L |
207
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208
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=back |
209
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210
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=head1 ACKNOWLEDGEMENTS |
211
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212
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Many thanks to my beautiful wife, Jennifer, and my amazing daughter, Rosemary. But, above all, SOLI DEO GLORIA! |
213
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214
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=head1 LICENSE AND COPYRIGHT |
215
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216
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Copyright 2016 Michael Wayne Arnold. |
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218
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This program is free software; you can redistribute it and/or modify it |
219
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under the terms of either: the GNU General Public License as published |
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by the Free Software Foundation; or the Artistic License. |
221
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222
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See L for more information. |
223
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224
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225
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=cut |
226
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227
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1; # End of Date::Lectionary::Time |