Comparing 2 DateTime instances and it's giving me the wrong result
0
I have 2 DateTime instances
today = Sun, 25 Nov 2018 18:59:00 -0500
tomorrow = Mon, 26 Nov 2018 00:00:00 GMT +00:00
When I do
today >= tomorrow
it comes out false which is correct
When I do
today + 1.minute >= tomorrow
it comes out true which is incorrect. Why is it doing that when the Nov 25 should be less than Nov 26? Is it somehow computing just the time and not the date? If yes, how can I fix this?
ruby datetime
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
add a comment |
0
I have 2 DateTime instances
today = Sun, 25 Nov 2018 18:59:00 -0500
tomorrow = Mon, 26 Nov 2018 00:00:00 GMT +00:00
When I do
today >= tomorrow
it comes out false which is correct
When I do
today + 1.minute >= tomorrow
it comes out true which is incorrect. Why is it doing that when the Nov 25 should be less than Nov 26? Is it somehow computing just the time and not the date? If yes, how can I fix this?
ruby datetime
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
1
Why should it be less? (Note the offset -0500 on thetodaydate)
– steenslag
Nov 25 '18 at 22:10
I feel like an idiot. Thanks for the note!
– C. Yee
Nov 25 '18 at 22:48
1
You should probably be usingTimeinstead ofDateTime: ruby-doc.org/stdlib/libdoc/date/rdoc/…
– Max
Nov 26 '18 at 14:53
@Max Thanks for the tip!
– C. Yee
Nov 26 '18 at 15:20
add a comment |
0
0
0
I have 2 DateTime instances
today = Sun, 25 Nov 2018 18:59:00 -0500
tomorrow = Mon, 26 Nov 2018 00:00:00 GMT +00:00
When I do
today >= tomorrow
it comes out false which is correct
When I do
today + 1.minute >= tomorrow
it comes out true which is incorrect. Why is it doing that when the Nov 25 should be less than Nov 26? Is it somehow computing just the time and not the date? If yes, how can I fix this?
ruby datetime
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
I have 2 DateTime instances
today = Sun, 25 Nov 2018 18:59:00 -0500
tomorrow = Mon, 26 Nov 2018 00:00:00 GMT +00:00
When I do
today >= tomorrow
it comes out false which is correct
When I do
today + 1.minute >= tomorrow
it comes out true which is incorrect. Why is it doing that when the Nov 25 should be less than Nov 26? Is it somehow computing just the time and not the date? If yes, how can I fix this?
ruby datetime
ruby datetime
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
asked Nov 25 '18 at 21:25
C. YeeC. Yee
618
618
1
Why should it be less? (Note the offset -0500 on thetodaydate)
– steenslag
Nov 25 '18 at 22:10
I feel like an idiot. Thanks for the note!
– C. Yee
Nov 25 '18 at 22:48
1
You should probably be usingTimeinstead ofDateTime: ruby-doc.org/stdlib/libdoc/date/rdoc/…
– Max
Nov 26 '18 at 14:53
@Max Thanks for the tip!
– C. Yee
Nov 26 '18 at 15:20
add a comment |
1
Why should it be less? (Note the offset -0500 on thetodaydate)
– steenslag
Nov 25 '18 at 22:10
I feel like an idiot. Thanks for the note!
– C. Yee
Nov 25 '18 at 22:48
1
You should probably be usingTimeinstead ofDateTime: ruby-doc.org/stdlib/libdoc/date/rdoc/…
– Max
Nov 26 '18 at 14:53
@Max Thanks for the tip!
– C. Yee
Nov 26 '18 at 15:20
1
1
Why should it be less? (Note the offset -0500 on the
today date)– steenslag
Nov 25 '18 at 22:10
Why should it be less? (Note the offset -0500 on the
today date)– steenslag
Nov 25 '18 at 22:10
I feel like an idiot. Thanks for the note!
– C. Yee
Nov 25 '18 at 22:48
I feel like an idiot. Thanks for the note!
– C. Yee
Nov 25 '18 at 22:48
1
1
You should probably be using
Time instead of DateTime: ruby-doc.org/stdlib/libdoc/date/rdoc/…– Max
Nov 26 '18 at 14:53
You should probably be using
Time instead of DateTime: ruby-doc.org/stdlib/libdoc/date/rdoc/…– Max
Nov 26 '18 at 14:53
@Max Thanks for the tip!
– C. Yee
Nov 26 '18 at 15:20
@Max Thanks for the tip!
– C. Yee
Nov 26 '18 at 15:20
add a comment |
1 Answer
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Note that today and tomorrow are in a different timezone. When you add 1.minute to today, both values become the same. Hence == returns true.
2.5.3 :001 > today = DateTime.parse('Sun, 25 Nov 2018 18:59:00 -0500')
=> Sun, 25 Nov 2018 18:59:00 -0500
2.5.3 :002 > tomorrow = DateTime.parse('Mon, 26 Nov 2018 00:00:00 GMT +00:00')
=> Mon, 26 Nov 2018 00:00:00 +0000
2.5.3 :003 > today >= tomorrow
=> false
2.5.3 :004 > today + 1.minute
=> Sun, 25 Nov 2018 19:00:00 -0500
2.5.3 :005 > today + 1.minute >= tomorrow
=> true
2.5.3 :006 > today + 1.minute == tomorrow
=> true
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
add a comment |
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1 Answer
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active
oldest
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1
Note that today and tomorrow are in a different timezone. When you add 1.minute to today, both values become the same. Hence == returns true.
2.5.3 :001 > today = DateTime.parse('Sun, 25 Nov 2018 18:59:00 -0500')
=> Sun, 25 Nov 2018 18:59:00 -0500
2.5.3 :002 > tomorrow = DateTime.parse('Mon, 26 Nov 2018 00:00:00 GMT +00:00')
=> Mon, 26 Nov 2018 00:00:00 +0000
2.5.3 :003 > today >= tomorrow
=> false
2.5.3 :004 > today + 1.minute
=> Sun, 25 Nov 2018 19:00:00 -0500
2.5.3 :005 > today + 1.minute >= tomorrow
=> true
2.5.3 :006 > today + 1.minute == tomorrow
=> true
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
add a comment |
1
Note that today and tomorrow are in a different timezone. When you add 1.minute to today, both values become the same. Hence == returns true.
2.5.3 :001 > today = DateTime.parse('Sun, 25 Nov 2018 18:59:00 -0500')
=> Sun, 25 Nov 2018 18:59:00 -0500
2.5.3 :002 > tomorrow = DateTime.parse('Mon, 26 Nov 2018 00:00:00 GMT +00:00')
=> Mon, 26 Nov 2018 00:00:00 +0000
2.5.3 :003 > today >= tomorrow
=> false
2.5.3 :004 > today + 1.minute
=> Sun, 25 Nov 2018 19:00:00 -0500
2.5.3 :005 > today + 1.minute >= tomorrow
=> true
2.5.3 :006 > today + 1.minute == tomorrow
=> true
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
add a comment |
1
1
1
Note that today and tomorrow are in a different timezone. When you add 1.minute to today, both values become the same. Hence == returns true.
2.5.3 :001 > today = DateTime.parse('Sun, 25 Nov 2018 18:59:00 -0500')
=> Sun, 25 Nov 2018 18:59:00 -0500
2.5.3 :002 > tomorrow = DateTime.parse('Mon, 26 Nov 2018 00:00:00 GMT +00:00')
=> Mon, 26 Nov 2018 00:00:00 +0000
2.5.3 :003 > today >= tomorrow
=> false
2.5.3 :004 > today + 1.minute
=> Sun, 25 Nov 2018 19:00:00 -0500
2.5.3 :005 > today + 1.minute >= tomorrow
=> true
2.5.3 :006 > today + 1.minute == tomorrow
=> true
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
Note that today and tomorrow are in a different timezone. When you add 1.minute to today, both values become the same. Hence == returns true.
2.5.3 :001 > today = DateTime.parse('Sun, 25 Nov 2018 18:59:00 -0500')
=> Sun, 25 Nov 2018 18:59:00 -0500
2.5.3 :002 > tomorrow = DateTime.parse('Mon, 26 Nov 2018 00:00:00 GMT +00:00')
=> Mon, 26 Nov 2018 00:00:00 +0000
2.5.3 :003 > today >= tomorrow
=> false
2.5.3 :004 > today + 1.minute
=> Sun, 25 Nov 2018 19:00:00 -0500
2.5.3 :005 > today + 1.minute >= tomorrow
=> true
2.5.3 :006 > today + 1.minute == tomorrow
=> true
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
answered Nov 25 '18 at 22:25
Lenin Raj RajasekaranLenin Raj Rajasekaran
16k1173115
16k1173115
add a comment |
add a comment |
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1
Why should it be less? (Note the offset -0500 on the
todaydate)– steenslag
Nov 25 '18 at 22:10
I feel like an idiot. Thanks for the note!
– C. Yee
Nov 25 '18 at 22:48
1
You should probably be using
Timeinstead ofDateTime: ruby-doc.org/stdlib/libdoc/date/rdoc/…– Max
Nov 26 '18 at 14:53
@Max Thanks for the tip!
– C. Yee
Nov 26 '18 at 15:20