time & last day of month

[gwenn]

Hi,

Could you please help me find the way to compute the last day of month?

While looking into time package, I've found 'daysIn' but it is not exported...

Thanks.

Note: In Java, the last day of month can be computed this way: Calendar.getActualMaximum(DAY_OF_MONTH) (standard lib), LocalDate.dayOfMonth().getMaximumValue() (joda time).

[Ian Lance Taylor]

On Wed, Oct 31, 2012 at 12:27 PM, gwenn <gwenn...@gmail.com> wrote:
> Hi,
> Could you please help me find the way to compute the last day of month?
> While looking into time package, I've found 'daysIn' but it is not
> exported...

The last day of the month depends on the year, of course.

Here is one way to do it.

http://play.golang.org/p/kTgmzTkyJs

Ian

[Rémy Oudompheng]

Another way of doing:
http://play.golang.org/p/xkSxRtckGh

Rémy.

[Kyle Lemons]

A day doesn't always have 24 hours.

Rémy.

--

[Rémy Oudompheng]

On 2012/10/31 Kyle Lemons <kev...@google.com> wrote:
> A day doesn't always have 24 hours.

The Go days have no leap seconds and the example was in UTC location.
Isn't that enough ?

Rémy.

[jonath...@gmail.com]

Old thread, so just for posterity..

Maybe just use year, m+1, 0 instead of year, m+1, 1 so you can avoid subtracting a day using -24 hours...

http://play.golang.org/p/ixFz2w8ozR

[nicolas...@gmail.com]

Another way:

http://play.golang.org/p/ydeCEp0657

[Shawn Milochik]

This way seems simplest to me.

http://play.golang.org/p/LShoYhAEP3

[pa...@daishisystems.com]

This library contains functionality designed to return the last day of any given month:

https://github.com/daishisystems/month

[messju mohr]

Another library woule be jinzhu's Now: <https://github.com/jinzhu/now>

now.EndOfMonth().Day() => 31

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[gwenn]

Sorry but I don't understand the following part: "that is not
available in standard Go libraries."
The link
http://play.golang.org/p/ixFz2w8ozR
previously posted in this thread proves the opposite, no ?

[pa...@daishisystems.com]

Thank you for pointing this out. I hadn’t considered that solution when drafting the package. Yes, I agree; the functionality is present in the core libraries. I’ve modified the package blurb accordingly.