The solution has a bug when b has the year higher than a. In my project I use a solution based on the Julian Day. More about this you can read here: http://en.wikipedia.org/wiki/Julian_day
On Wednesday, October 21, 2015 at 3:34:51 PM UTC+3, Karthik Krishnamurthy wrote: > > This is an old post, but responding to it in case someone else needs this. > > http://play.golang.org/p/nTcjGZQKAa > > > On Saturday, February 23, 2013 at 2:04:46 PM UTC-8, Vincent wrote: >> >> Hi, >> >> I recently needed to compute the difference between to dates, expressed >> in days. I assumed this was a common operation - it comes often enough when >> manipulating dates - but I couldn't find any trivial go code for this. >> I came up with the following solution (the only other alternative I >> considered so far was to compute the duration between the two dates, divide >> the result by 24*time.Hour and then round the result... but somehow I gave >> up because it felt somehow ugly - and also because AFAICT there is no >> ready-to-use "round a float to the nearest integer" function in the std >> library). >> >> I'd be curious to know if people here can suggest a better way of doing >> this... >> >> Best regards, >> >> Vincent >> >> -------------------------------- >> package main >> >> import "fmt" >> import "time" >> >> func diffDays(year2, month2, day2, year1, month1, day1 int) int { >> if year2 < year1 { >> return -diffDays(year1, month1, day1, year2, month2, day2) >> } >> d2 := time.Date(year2, time.Month(month2), day2, 0, 0, 0, 0, time.UTC) >> d1 := time.Date(year1, time.Month(month1), day1, 0, 0, 0, 0, time.UTC) >> diff := d2.YearDay() - d1.YearDay() >> >> for y := year1; y < year2; y++ { >> diff += time.Date(y, time.December, 31, 0, 0, 0, 0, >> time.UTC).YearDay() >> } >> /* if debug && !d1.AddDate(0, 0, diff).Equal(d2) { >> panic("invalid diff") >> } */ >> return diff >> } >> >> func main() { >> d := diffDays(2012, 9, 31, 2011, 10, 1) >> fmt.Println(d, " days") >> >> } >> >> -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
