6 ms·

Show HN: Durat.io

119 points by strictfp 11y ago

empressplay 11y ago
Neat.
kozhevnikov 11y ago
Can it do anything wolframalpha.com can't?
- DiabloD3 11y ago
  I came here to say this. I use WA for all my time calculations.
- strictfp 11y ago
  Well, I'm not sure. I aimed at getting better than google calculator. But hopefully durat.io is quicker. Any requests are welcome! edit: After doing some quick testing, Wolfram doesn't seem very good at time zone conversions or time span conversions.
mapcars 11y ago
Ever heard about rebol? >> now == 13-Jul-2015/11:46:45+3:00 >> now + 4:15 == 13-Jul-2015/16:01:52+3:00
- strictfp 11y ago
  nope, but thanks for the information. Please check out the time zone conversions as well.
- anc84 11y ago
  PostgreSQL also does time calculations spectacularly well.
  - mapcars 11y ago
    Yep, but my key point here is the syntax baked into the language itself.
cbhl 11y ago
Looks pretty good. Some nits: The query "9999-99-99" throws java.time.format.DateTimeParseException (http://durat.io/?q=9999-99-99 http://durat.io/?q=9999-99-99). The query "2147483647 days + 1 day" throws java.lang.ArithmeticException (http://durat.io/?q=2147483647+days+%2B+1+day http://durat.io/?q=2147483647+days+%2B+1+day) The query "1752-09-14 - 1752-09-02" returns PT288H, but arguably it should return PT24H (http://durat.io/?q=1752-09-14+-+1752-09-02 http://durat.io/?q=1752-09-14+-+1752-09-02, see also: https://en.wikipedia.org/wiki/Cal_(Unix)#Features https://en.wikipedia.org/wiki/Cal_(Unix)#Features)
- strictfp 11y ago
  Thanks for the QA! I haven't put all to much time into weeding out all the bugs yet. If the site gets popular that will definitely change. edit: The first bug is a showstopper. Everything is supposed to be a bigint, so this will be fixed ASAP. The second one I will catch and print a nicer error for. The third one I will have to look into. I probably perform the calculation incorrectly by using the wrong temporal types. Thanks again.
  - JoshTriplett 11y ago
    The third one is the hardest to deal with: ~$ cal 9 1752 September 1752 Su Mo Tu We Th Fr Sa 1 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 This isn't the only bit of craziness you'd need to deal with if you wanted to handle historical times perfectly. For instance, consider attempting to get an accurate duration in hours of a time that extends across the daylight savings time switchover, historically, in a region where that has changed from year to year. Another interesting one: 2015-07-01 - 2015-06-29 returns "PT48H", but it should be 48 hours and 1 second.
    - strictfp 11y ago
      I'm currently passing on all the date calculations to the java.time API, so at least I won't have to do it all on my own. But it's sometimes a challenge to even pass it down the right way will all the different use-cases and temporal types available.
haberman 11y ago
Reminds me a little of Date::Manip, the crazy Perl date library that would actually accept strings like: "2 weeks ago on Friday at 13:45" "Saturday Christmas 2010 at noon" http://search.cpan.org/~sbeck/Date-Manip-6.50/lib/Date/Manip/Date.pod http://search.cpan.org/~sbeck/Date-Manip-6.50/lib/Date/Manip...
strictfp 11y ago
Author here. I built this primarily to perform time-sheet calculations and to figure out what time it is in different cities easily when talking to friends overseas. The site is the culmination of my experimentation with parsers, and specifically my last little Java TDOP parser library bychan (https://github.com/atorstling/bychan https://github.com/atorstling/bychan). Please criticize / ask any questions and/or suggest anything below.
- acqq 11y ago
  Looks OK. Now looking at the examples, the answer for "now in zone Lisbon" gives 2015-07-13T13:31:47.968+01:00[Europe/Lisbon] Why not just "today, 14:31:47, Lisbon"? If I enter the expression I don't actually like receiving the expression as the answer. Also, the whole "expression" of the translation of the question is displayed, when most probably the user doesn't need it every time, and then it's initially confusing.
  - strictfp 11y ago
    Thanks for your feedback. I agree that the representation is suboptimal. I will work on this if there is interest in the site. Regarding the ast representation, I will think about making it optional.
  - virgoerns 11y ago
    https://xkcd.com/1179/ https://xkcd.com/1179/ BTW: what does "today" mean when your wall clock shows e.g. 23:25:00? Is it "today in Lisbon" or "today at your timezone"?
    - acqq 11y ago
      I agree, it can be confusing too. At least as long as the "today" is the same on both places, it's clear. I'd keep the full date when it's not today on both places. And do you prefer the current: 2015-07-13T13:31:47.968+01:00[Europe/Lisbon] or something simpler?
    - frogpelt 11y ago
deleted 11y ago
[deleted]
sprain 11y ago
My first try was "today + 6 weeks". Got "Lexing failed". My second try was "now + 2 hours in new york". Got "Lexing failed". I suppose, I doesn't understand my accent ;)
- strictfp 11y ago
  My NLP is not top notch :D. I figured that getting the parsing intuitive would be doable given the relatively narrow field, but I was proven wrong :) The result is that you need to learn the syntax a bit before it feels intuitive. Regarding your specific examples: You need "in _zone_ new york" ATM. I think 'weeks' is missing simply as the result of an oversight :/ Thanks for the QA.
  - deleted 11y ago
    [deleted]
- przemoc 11y ago
  If you're *nix user, you can quite easily perform this kind of stuff using date, or at least using date from coreutils. $ date -d 'today + 6 weeks' Mon Aug 24 13:15:54 CEST 2015 $ TZ=America/New_York date -d 'now + 2 hours' Mon Jul 13 09:16:17 EDT 2015
  - strictfp 11y ago
    I had no idea. Great tip, thanks!
ochronus 11y ago
Haha, nice, good to see my old domain put to a better use :))
- strictfp 11y ago
  What a coincidence! I spent a _lot_ of time trying to find some time-related domain name which wasn't taken. What were you using it for?
ysr23 11y ago
oops, i borked it: http://durat.io/?q=0%2F0 http://durat.io/?q=0%2F0
- strictfp 11y ago
  Nicely done! At least you didn't try to paste half of wikipedia into the input field as my nice collegue did :)
david927 11y ago
Great job! Well done.
ejcx 11y ago
Nice work. Looks like a useful tool, especially since time calculations can be confusing. Remember to sanitize your input. http://durat.io/?q=%22/%3E%3Cscript%3Ealert(1);%3C/script%3E http://durat.io/?q=%22/%3E%3Cscript%3Ealert(1);%3C/script%3E
- strictfp 11y ago
  Poor little Bobby Tables can't register :D Thanks
edraferi 11y ago
You could bring this to a wider audience by integrating it with DuckDuckGo. You can arrange for DDG to send appropriate queries to your service with Spice [0]. If you don't want to handle the traffic, you can program an instant answer that runs on the DDG servers. Right now they have separate modules for time zone conversion [1], unit conversion [2] and uptime calculation [3]. Durat.io appears to hit a much wider set of use cases. [0] https://duck.co/duckduckhack/spice_overview https://duck.co/duckduckhack/spice_overview [1] https://duck.co/ia/view/timezone_converter https://duck.co/ia/view/timezone_converter [2] https://duck.co/ia/view/conversions https://duck.co/ia/view/conversions [3] https://duck.co/ia/view/uptime https://duck.co/ia/view/uptime
- strictfp 11y ago
  This is a great idea! Thanks!
magnusstubman 11y ago
The site is vulnerable to xss: http://durat.io/?q=this%20site%20is%vulnerable%20to%20XSS%3Cscript%3Ealert(%27xss%27);%3C/script%3E http://durat.io/?q=this%20site%20is%vulnerable%20to%20XSS%3C...
deleted 11y ago
[deleted]
jastanton 11y ago
Does PT stands for present time? > 8:30am + 2.5 hours = PT11H
- strictfp 11y ago
  Nope, it's https://en.wikipedia.org/wiki/ISO_8601 https://en.wikipedia.org/wiki/ISO_8601 for 11 hours. Try "8:30 am today + 2.5 hours".
funerr 11y ago
XSS? http://durat.io/?q=%22%20/%3E%3Cscript%3Ealert(1)%3C/script%3E http://durat.io/?q=%22%20/%3E%3Cscript%3Ealert(1)%3C/script%...
- strictfp 11y ago
  Yes, will be fixed.
mtourne 11y ago
I've been using Soulver on mac which does a lot of similar unit calculations, conversions etc. Works with time (but maybe not as advanced) and a lot of other things.

Show HN: Durat.io

119 points by strictfp 11y ago

empressplay 11y ago

Neat.

kozhevnikov 11y ago

Can it do anything wolframalpha.com can't?

DiabloD3 11y ago
I came here to say this. I use WA for all my time calculations.
strictfp 11y ago
Well, I'm not sure. I aimed at getting better than google calculator. But hopefully durat.io is quicker. Any requests are welcome! edit: After doing some quick testing, Wolfram doesn't seem very good at time zone conversions or time span conversions.

mapcars 11y ago

Ever heard about rebol? >> now == 13-Jul-2015/11:46:45+3:00 >> now + 4:15 == 13-Jul-2015/16:01:52+3:00

strictfp 11y ago
nope, but thanks for the information. Please check out the time zone conversions as well.
anc84 11y ago
PostgreSQL also does time calculations spectacularly well.
- mapcars 11y ago
  Yep, but my key point here is the syntax baked into the language itself.

cbhl 11y ago

Looks pretty good. Some nits: The query "9999-99-99" throws java.time.format.DateTimeParseException (http://durat.io/?q=9999-99-99 http://durat.io/?q=9999-99-99). The query "2147483647 days + 1 day" throws java.lang.ArithmeticException (http://durat.io/?q=2147483647+days+%2B+1+day http://durat.io/?q=2147483647+days+%2B+1+day) The query "1752-09-14 - 1752-09-02" returns PT288H, but arguably it should return PT24H (http://durat.io/?q=1752-09-14+-+1752-09-02 http://durat.io/?q=1752-09-14+-+1752-09-02, see also: https://en.wikipedia.org/wiki/Cal_(Unix)#Features https://en.wikipedia.org/wiki/Cal_(Unix)#Features)

strictfp 11y ago
Thanks for the QA! I haven't put all to much time into weeding out all the bugs yet. If the site gets popular that will definitely change. edit: The first bug is a showstopper. Everything is supposed to be a bigint, so this will be fixed ASAP. The second one I will catch and print a nicer error for. The third one I will have to look into. I probably perform the calculation incorrectly by using the wrong temporal types. Thanks again.
- JoshTriplett 11y ago
  The third one is the hardest to deal with: ~$ cal 9 1752 September 1752 Su Mo Tu We Th Fr Sa 1 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 This isn't the only bit of craziness you'd need to deal with if you wanted to handle historical times perfectly. For instance, consider attempting to get an accurate duration in hours of a time that extends across the daylight savings time switchover, historically, in a region where that has changed from year to year. Another interesting one: 2015-07-01 - 2015-06-29 returns "PT48H", but it should be 48 hours and 1 second.
  - strictfp 11y ago
    I'm currently passing on all the date calculations to the java.time API, so at least I won't have to do it all on my own. But it's sometimes a challenge to even pass it down the right way will all the different use-cases and temporal types available.

haberman 11y ago

Reminds me a little of Date::Manip, the crazy Perl date library that would actually accept strings like: "2 weeks ago on Friday at 13:45" "Saturday Christmas 2010 at noon" http://search.cpan.org/~sbeck/Date-Manip-6.50/lib/Date/Manip/Date.pod http://search.cpan.org/~sbeck/Date-Manip-6.50/lib/Date/Manip...

strictfp 11y ago

Author here. I built this primarily to perform time-sheet calculations and to figure out what time it is in different cities easily when talking to friends overseas. The site is the culmination of my experimentation with parsers, and specifically my last little Java TDOP parser library bychan (https://github.com/atorstling/bychan https://github.com/atorstling/bychan). Please criticize / ask any questions and/or suggest anything below.

acqq 11y ago
Looks OK. Now looking at the examples, the answer for "now in zone Lisbon" gives 2015-07-13T13:31:47.968+01:00[Europe/Lisbon] Why not just "today, 14:31:47, Lisbon"? If I enter the expression I don't actually like receiving the expression as the answer. Also, the whole "expression" of the translation of the question is displayed, when most probably the user doesn't need it every time, and then it's initially confusing.
- strictfp 11y ago
  Thanks for your feedback. I agree that the representation is suboptimal. I will work on this if there is interest in the site. Regarding the ast representation, I will think about making it optional.
- virgoerns 11y ago
  https://xkcd.com/1179/ https://xkcd.com/1179/ BTW: what does "today" mean when your wall clock shows e.g. 23:25:00? Is it "today in Lisbon" or "today at your timezone"?
  - acqq 11y ago
    I agree, it can be confusing too. At least as long as the "today" is the same on both places, it's clear. I'd keep the full date when it's not today on both places. And do you prefer the current: 2015-07-13T13:31:47.968+01:00[Europe/Lisbon] or something simpler?
  - frogpelt 11y ago

deleted 11y ago

[deleted]

sprain 11y ago

My first try was "today + 6 weeks". Got "Lexing failed". My second try was "now + 2 hours in new york". Got "Lexing failed". I suppose, I doesn't understand my accent ;)

strictfp 11y ago
My NLP is not top notch :D. I figured that getting the parsing intuitive would be doable given the relatively narrow field, but I was proven wrong :) The result is that you need to learn the syntax a bit before it feels intuitive. Regarding your specific examples: You need "in _zone_ new york" ATM. I think 'weeks' is missing simply as the result of an oversight :/ Thanks for the QA.
- deleted 11y ago
  [deleted]
przemoc 11y ago
If you're *nix user, you can quite easily perform this kind of stuff using date, or at least using date from coreutils. $ date -d 'today + 6 weeks' Mon Aug 24 13:15:54 CEST 2015 $ TZ=America/New_York date -d 'now + 2 hours' Mon Jul 13 09:16:17 EDT 2015
- strictfp 11y ago
  I had no idea. Great tip, thanks!

ochronus 11y ago

Haha, nice, good to see my old domain put to a better use :))

strictfp 11y ago
What a coincidence! I spent a _lot_ of time trying to find some time-related domain name which wasn't taken. What were you using it for?

ysr23 11y ago

oops, i borked it: http://durat.io/?q=0%2F0 http://durat.io/?q=0%2F0

strictfp 11y ago
Nicely done! At least you didn't try to paste half of wikipedia into the input field as my nice collegue did :)

david927 11y ago

Great job! Well done.

ejcx 11y ago

Nice work. Looks like a useful tool, especially since time calculations can be confusing. Remember to sanitize your input. http://durat.io/?q=%22/%3E%3Cscript%3Ealert(1);%3C/script%3E http://durat.io/?q=%22/%3E%3Cscript%3Ealert(1);%3C/script%3E

strictfp 11y ago
Poor little Bobby Tables can't register :D Thanks

edraferi 11y ago

You could bring this to a wider audience by integrating it with DuckDuckGo. You can arrange for DDG to send appropriate queries to your service with Spice [0]. If you don't want to handle the traffic, you can program an instant answer that runs on the DDG servers. Right now they have separate modules for time zone conversion [1], unit conversion [2] and uptime calculation [3]. Durat.io appears to hit a much wider set of use cases. [0] https://duck.co/duckduckhack/spice_overview https://duck.co/duckduckhack/spice_overview [1] https://duck.co/ia/view/timezone_converter https://duck.co/ia/view/timezone_converter [2] https://duck.co/ia/view/conversions https://duck.co/ia/view/conversions [3] https://duck.co/ia/view/uptime https://duck.co/ia/view/uptime

strictfp 11y ago
This is a great idea! Thanks!

magnusstubman 11y ago

The site is vulnerable to xss: http://durat.io/?q=this%20site%20is%vulnerable%20to%20XSS%3Cscript%3Ealert(%27xss%27);%3C/script%3E http://durat.io/?q=this%20site%20is%vulnerable%20to%20XSS%3C...

deleted 11y ago

[deleted]

jastanton 11y ago

Does PT stands for present time? > 8:30am + 2.5 hours = PT11H

strictfp 11y ago
Nope, it's https://en.wikipedia.org/wiki/ISO_8601 https://en.wikipedia.org/wiki/ISO_8601 for 11 hours. Try "8:30 am today + 2.5 hours".

funerr 11y ago

XSS? http://durat.io/?q=%22%20/%3E%3Cscript%3Ealert(1)%3C/script%3E http://durat.io/?q=%22%20/%3E%3Cscript%3Ealert(1)%3C/script%...

strictfp 11y ago
Yes, will be fixed.

mtourne 11y ago

I've been using Soulver on mac which does a lot of similar unit calculations, conversions etc. Works with time (but maybe not as advanced) and a lot of other things.