Working with the time package in Go is hard. And I think that a lot of Go programmers see it the same way.
Parsing time, replacing days of a time.Time
object and other operations are not natural compared to other languages.
For example parsing a string
into a time.Time
object looks like this:
import "time"
parsed, err := time.Parse(
"02.01.2006 15:04:05",
"09.04.2020 11:49:54",
)
Or replacing the day of current time
object:
import "time"
parsed, err := time.Parse(
"02.01.2006 15:04:05",
"09.04.2020 11:49:54",
)
if err != nil {
panic(err)
}
replacedDay := time.Date(parsed.Year(), parsed.Month(), 10, parsed.Hour(), parsed.Minute(), parsed.Second(), parsed.Nanosecond(), parsed.Location())
The time
package provides all needed functionality but still it takes too much knowledge about the package itself to get to a slim solution.
So I programmed Gostradamus: Better DateTimes in Go
to simplify DateTimes handling and parsing/formatting.
Letβs take the examples above and implement them in Gostradamus:
import "github.com/bykof/gostradamus"
parsed, err := gostradamus.Parse(
"09.04.2020 11:49:54",
"DD.MM.YYYY HH:mm:ss",
)
Pretty easy huh? And also a really common way to parse dates and times. All parsing tokens can be found here.
The second example would look like this in gostradamus:
import "github.com/bykof/gostradamus"
parsed, err := gostradamus.Parse(
"09.04.2020 11:49:54",
"DD.MM.YYYY HH:mm:ss",
)
if err != nil {
panic(err)
}
replacedDay := parsed.ReplaceDay(10)
Working with DateTimes was never so easy in Go! Gostradamus offers this and much more. Just look up some of the features in the Github Readme or all features in the go.dev reference. Itβs also fully compatible with time.Time
and can be parsed from and to it.
I hope I could help you a lot with my new package: Gostradamus (Github).
If you like it just leave a β!
If you want to improve or add functionality, feel free to contribute!
Bonus
Gostradamus provides also an easy way to handle timezones. All possible timezones are saved in constants (here).
So you can easily convert from one timezone into another:
import "github.com/bykof/gostradamus"
dateTime := gostradamus.Now()
dateTime = dateTime.InTimeZone(gostradamus.AmericaNewYork)
And also Shifting, Ceiling or Flooring is not a problem:
import "github.com/bykof/gostradamus"
dateTime := gostradamus.Now()
dateTime = dateTime.ShiftDays(-14).CeilMonth()
Next Steps
Next steps in the package would be to offer weeks support and to implement timedeltas, where one could actually subtract one DateTime from another to get the passed time in between.
For example:
dateTime := gostradamus.Now()
... // some computation
gostradamus.Now().Difference(dateTime).Seconds()
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