With a given date, I want to know what day it is (like Sunday, Monday, etc).

I had a look up on std.datetime, and core.time, but they don't seem to have a function for it.

On 29/09/2017 4:25 AM, Joel wrote:
> With a given date, I want to know what day it is (like Sunday, Monday, etc).
> 
> I had a look up on std.datetime, and core.time, but they don't seem to have a function for it.

https://dlang.org/phobos/std_datetime_date.html#.DateTime.dayOfWeek

On Friday, September 29, 2017 04:32:44 rikki cattermole via Digitalmars-d- learn wrote:
> On 29/09/2017 4:25 AM, Joel wrote:
> > With a given date, I want to know what day it is (like Sunday, Monday,
> > etc).
> >
> > I had a look up on std.datetime, and core.time, but they don't seem to have a function for it.
>
> https://dlang.org/phobos/std_datetime_date.html#.DateTime.dayOfWeek

Date and SysTime also have that function. So, whether you're creating one of those types manually - e.g. Date(2012, 7, 19) - or getting it from the system clock - e.g. Clock.currTime() - dayOfWeek will give you the day of the week for that particular object. TimeOfDay is the only time point type in std.datetime that does not have dayOfWeek, but that's because it makes no sense given that it simply represents a time of day.

- Jonathan M Davis

Thanks guys. :-D

On Friday, 29 September 2017 at 03:42:18 UTC, Jonathan M Davis wrote:
> On Friday, September 29, 2017 04:32:44 rikki cattermole via Digitalmars-d- learn wrote:
>> On 29/09/2017 4:25 AM, Joel wrote:
>> > With a given date, I want to know what day it is (like Sunday, Monday,
>> > etc).
>> >
>> > I had a look up on std.datetime, and core.time, but they don't seem to have a function for it.
>>
>> https://dlang.org/phobos/std_datetime_date.html#.DateTime.dayOfWeek
>
> Date and SysTime also have that function. So, whether you're creating one of those types manually - e.g. Date(2012, 7, 19) - or getting it from the system clock - e.g. Clock.currTime() - dayOfWeek will give you the day of the week for that particular object. TimeOfDay is the only time point type in std.datetime that does not have dayOfWeek, but that's because it makes no sense given that it simply represents a time of day.
>
> - Jonathan M Davis

The documentation of std.datetime is very confusing at first. Monotime, Clock, DateTime, SysTime (deprecated?) ... can confuse you even though their names seems obvious when you're used to.... And then there's secs, mins, etc and those undocumented ones.

On Friday, September 29, 2017 14:34:04 aberba via Digitalmars-d-learn wrote:
> On Friday, 29 September 2017 at 03:42:18 UTC, Jonathan M Davis
>
> wrote:
> > On Friday, September 29, 2017 04:32:44 rikki cattermole via
> >
> > Digitalmars-d- learn wrote:
> >> On 29/09/2017 4:25 AM, Joel wrote:
> >> > With a given date, I want to know what day it is (like
> >> > Sunday, Monday,
> >> > etc).
> >> >
> >> > I had a look up on std.datetime, and core.time, but they don't seem to have a function for it.
> >>
> >> https://dlang.org/phobos/std_datetime_date.html#.DateTime.dayOfWeek
> >
> > Date and SysTime also have that function. So, whether you're creating one of those types manually - e.g. Date(2012, 7, 19) - or getting it from the system clock - e.g. Clock.currTime() - dayOfWeek will give you the day of the week for that particular object. TimeOfDay is the only time point type in std.datetime that does not have dayOfWeek, but that's because it makes no sense given that it simply represents a time of day.
> >
> > - Jonathan M Davis
>
> The documentation of std.datetime is very confusing at first. Monotime, Clock, DateTime, SysTime (deprecated?)

SysTime is not deprecated. If anything, it's the time point type that most code should be using. Now that std.datetime has been split into separate modules, it's in std.datetime.systime.

>  ... can confuse
> you even though their names seems obvious when you're used to....

Well, I really don't know how to help you there. The documentation on the types and functions in there says what they do, and there are examples on most of the functions.

> And then there's secs, mins, etc and those undocumented ones.

I'm not sure what you're talking about here. AFAIK, everything is documented. The only missing docs that I'm aware of are some examples that don't show up on some of the functions due to a compiler bug.

- Jonathan M Davis