Re: [Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
Thank you. Will do. On Mon, Sep 17, 2012 at 7:14 AM, Antoine Latter aslat...@gmail.com wrote: On Sun, Sep 16, 2012 at 5:04 PM, Richard O'Keefe o...@cs.otago.ac.nz wrote: On 15/09/2012, at 5:14 AM, Chris Heller wrote: You might want to have a look at the time-recurrence package: http://hackage.haskell.org/package/time-recurrence For your simple cases you would do something like: Each second: starting (UTCTime ...) $ recur secondly Each minute: starting (UTCTime ...) $ recur minutely Ouch. Look up minutely (my-NEWT-ly) in an English dictionary. Look up secondly while you're there. You can blame RFC 5545 for that one. In section 3.3.10. our frequencies are: freq= SECONDLY / MINUTELY / HOURLY / DAILY / WEEKLY / MONTHLY / YEARLY Antoine ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
On 15/09/2012, at 5:14 AM, Chris Heller wrote: You might want to have a look at the time-recurrence package: http://hackage.haskell.org/package/time-recurrence For your simple cases you would do something like: Each second: starting (UTCTime ...) $ recur secondly Each minute: starting (UTCTime ...) $ recur minutely Ouch. Look up minutely (my-NEWT-ly) in an English dictionary. Look up secondly while you're there. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
On Sun, Sep 16, 2012 at 5:04 PM, Richard O'Keefe o...@cs.otago.ac.nz wrote: On 15/09/2012, at 5:14 AM, Chris Heller wrote: You might want to have a look at the time-recurrence package: http://hackage.haskell.org/package/time-recurrence For your simple cases you would do something like: Each second: starting (UTCTime ...) $ recur secondly Each minute: starting (UTCTime ...) $ recur minutely Ouch. Look up minutely (my-NEWT-ly) in an English dictionary. Look up secondly while you're there. You can blame RFC 5545 for that one. In section 3.3.10. our frequencies are: freq= SECONDLY / MINUTELY / HOURLY / DAILY / WEEKLY / MONTHLY / YEARLY Antoine ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
Antoine has it right, the language is lifted from the RFC. Chris Heller SAS - Advanced Analytics Teragram Research Development phone: 1-617-576-6800 x54237 mobile: 1-617-460-3643 email: hel...@teragram.com On Sep 16, 2012, at 7:14 PM, Antoine Latter aslat...@gmail.com wrote: On Sun, Sep 16, 2012 at 5:04 PM, Richard O'Keefe o...@cs.otago.ac.nz wrote: On 15/09/2012, at 5:14 AM, Chris Heller wrote: You might want to have a look at the time-recurrence package: http://hackage.haskell.org/package/time-recurrence For your simple cases you would do something like: Each second: starting (UTCTime ...) $ recur secondly Each minute: starting (UTCTime ...) $ recur minutely Ouch. Look up minutely (my-NEWT-ly) in an English dictionary. Look up secondly while you're there. You can blame RFC 5545 for that one. In section 3.3.10. our frequencies are: freq= SECONDLY / MINUTELY / HOURLY / DAILY / WEEKLY / MONTHLY / YEARLY Antoine ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
On Thu, Sep 13, 2012 at 10:29 PM, Magicloud Magiclouds magicloud.magiclo...@gmail.com wrote: Hi, Simple usage, I could make an instance of Enum to UTCTime, so [utcTime..] could work. But that is so stiff. How if sometimes I want to step by 1 min, sometimes I want to step by 1 sec? So I think some way like [ t | addUTCTime last 60 ] could be nice. But I cannot figure it out Any idea? Try using Prelude.iterate. -Karl ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
Consider using the time-lens package. import Data.Time.Lens import Data.Lens.Common List comprehension style: [modL seconds (+ fromIntegral n) t | n - [0..]] [modL minutes (+ n) t | n - [0..]] (you need fromIntegral for seconds, because it is of fractional type in Data.Time). iterate style, as suggested by Karl: iterate (seconds ^+= 1) t iterate (minutes ^+= 1) t On Fri, Sep 14, 2012 at 7:29 AM, Magicloud Magiclouds magicloud.magiclo...@gmail.com wrote: Hi, Simple usage, I could make an instance of Enum to UTCTime, so [utcTime..] could work. But that is so stiff. How if sometimes I want to step by 1 min, sometimes I want to step by 1 sec? So I think some way like [ t | addUTCTime last 60 ] could be nice. But I cannot figure it out Any idea? -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
This is nice. Thanks to all. On Fri, Sep 14, 2012 at 4:03 PM, Roman Cheplyaka r...@ro-che.info wrote: Consider using the time-lens package. import Data.Time.Lens import Data.Lens.Common List comprehension style: [modL seconds (+ fromIntegral n) t | n - [0..]] [modL minutes (+ n) t | n - [0..]] (you need fromIntegral for seconds, because it is of fractional type in Data.Time). iterate style, as suggested by Karl: iterate (seconds ^+= 1) t iterate (minutes ^+= 1) t On Fri, Sep 14, 2012 at 7:29 AM, Magicloud Magiclouds magicloud.magiclo...@gmail.com wrote: Hi, Simple usage, I could make an instance of Enum to UTCTime, so [utcTime..] could work. But that is so stiff. How if sometimes I want to step by 1 min, sometimes I want to step by 1 sec? So I think some way like [ t | addUTCTime last 60 ] could be nice. But I cannot figure it out Any idea? -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] What is the good way to work with list comprehension and UTCTime?
Hi, Simple usage, I could make an instance of Enum to UTCTime, so [utcTime..] could work. But that is so stiff. How if sometimes I want to step by 1 min, sometimes I want to step by 1 sec? So I think some way like [ t | addUTCTime last 60 ] could be nice. But I cannot figure it out Any idea? -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
