digitalmars.D.learn - Get current date and time with std.datetime

Joel Christensen (8/8) Oct 06 2011 Hi,

Jonathan M Davis (2/11) Oct 06 2011 http://d-programming-language.org/intro-to-datetime.html

Jacob Carlborg (5/16) Oct 06 2011 May I suggest that you put an example on top of that article that gets

Jonathan M Davis (4/20) Oct 06 2011 It's already in the documentation at the top of the module. What I need ...
Jonathan M Davis (6/27) Oct 06 2011 I just added a link to the article to std.datetime, so it'll be there st...

Jacob Carlborg (4/31) Oct 07 2011 That would be nice too.

Joel Christensen (8/9) Oct 06 2011 Thanks Jonathan, that helped I think, (haven't read it all, though). But...

Jonathan M Davis (6/16) Oct 24 2011 Month is an enum. So, any function taking a month must take an enum valu...

Luke Picardo (6/25) Jun 30 2016 Why is it so hard to simply get the current date and time

Zekereth (9/13) Jul 01 2016 To get the current time, use Clock.currTime. It will return the

Joel (20/35) Aug 22 2016 This is what I use:

Joel Christensen <joelcnz gmail.com> writes:

Hi,

I have a program that uses the old time stuff before the module 
std.datetime. I have a DateTime object, but I can't seem to set its 
properties to the current time.

Some thing like:
DateTime dateTime;
dateTime = getCurrentDateTime();

-JoelCNZ

Oct 06 2011

Jonathan M Davis <jmdavisProg gmx.com> writes:

On Friday, October 07, 2011 19:08:33 Joel Christensen wrote:
 Hi,
 
 I have a program that uses the old time stuff before the module
 std.datetime. I have a DateTime object, but I can't seem to set its
 properties to the current time.
 
 Some thing like:
 DateTime dateTime;
 dateTime = getCurrentDateTime();

http://d-programming-language.org/intro-to-datetime.html

Oct 06 2011

Jacob Carlborg <doob me.com> writes:

On 2011-10-07 08:15, Jonathan M Davis wrote:
 On Friday, October 07, 2011 19:08:33 Joel Christensen wrote:
 Hi,

 I have a program that uses the old time stuff before the module
 std.datetime. I have a DateTime object, but I can't seem to set its
 properties to the current time.

 Some thing like:
 DateTime dateTime;
 dateTime = getCurrentDateTime();

 http://d-programming-language.org/intro-to-datetime.html

May I suggest that you put an example on top of that article that gets 
the current date and time.

-- 
/Jacob Carlborg

Oct 06 2011

Jonathan M Davis <jmdavisProg gmx.com> writes:

On Friday, October 07, 2011 08:23:10 Jacob Carlborg wrote:
 On 2011-10-07 08:15, Jonathan M Davis wrote:
 On Friday, October 07, 2011 19:08:33 Joel Christensen wrote:
 Hi,
 
 I have a program that uses the old time stuff before the module
 std.datetime. I have a DateTime object, but I can't seem to set its
 properties to the current time.
 
 Some thing like:
 DateTime dateTime;
 dateTime = getCurrentDateTime();

 
 http://d-programming-language.org/intro-to-datetime.html

 
 May I suggest that you put an example on top of that article that gets
 the current date and time.

It's already in the documentation at the top of the module. What I need to do 
is put a link to the article in that documetantion.

- Jonathan M Davis

Oct 06 2011

Jonathan M Davis <jmdavisProg gmx.com> writes:

On Thursday, October 06, 2011 23:31:26 Jonathan M Davis wrote:
 On Friday, October 07, 2011 08:23:10 Jacob Carlborg wrote:
 On 2011-10-07 08:15, Jonathan M Davis wrote:
 On Friday, October 07, 2011 19:08:33 Joel Christensen wrote:
 Hi,
 
 I have a program that uses the old time stuff before the module
 std.datetime. I have a DateTime object, but I can't seem to set
 its
 properties to the current time.
 
 Some thing like:
 DateTime dateTime;
 dateTime = getCurrentDateTime();

 
 http://d-programming-language.org/intro-to-datetime.html

 
 May I suggest that you put an example on top of that article that gets
 the current date and time.

 
 It's already in the documentation at the top of the module. What I need to
 do is put a link to the article in that documetantion.

I just added a link to the article to std.datetime, so it'll be there starting 
with the next release. What I'd _really_ like to see fixed though is the 
anchor-generation with ddoc so that I can actually properly organize the links 
at the top of std.datetime.

- Jonathan M Davis

Oct 06 2011

Jacob Carlborg <doob me.com> writes:

On 2011-10-07 08:54, Jonathan M Davis wrote:
 On Thursday, October 06, 2011 23:31:26 Jonathan M Davis wrote:
 On Friday, October 07, 2011 08:23:10 Jacob Carlborg wrote:
 On 2011-10-07 08:15, Jonathan M Davis wrote:
 On Friday, October 07, 2011 19:08:33 Joel Christensen wrote:
 Hi,

 I have a program that uses the old time stuff before the module
 std.datetime. I have a DateTime object, but I can't seem to set
 its
 properties to the current time.

 Some thing like:
 DateTime dateTime;
 dateTime = getCurrentDateTime();

 http://d-programming-language.org/intro-to-datetime.html

 May I suggest that you put an example on top of that article that gets
 the current date and time.

 It's already in the documentation at the top of the module. What I need to
 do is put a link to the article in that documetantion.

 I just added a link to the article to std.datetime, so it'll be there starting
 with the next release. What I'd _really_ like to see fixed though is the
 anchor-generation with ddoc so that I can actually properly organize the links
 at the top of std.datetime.

 - Jonathan M Davis

That would be nice too.

-- 
/Jacob Carlborg

Oct 07 2011

Joel Christensen <joelcnz gmail.com> writes:

 http://d-programming-language.org/intro-to-datetime.html

Thanks Jonathan, that helped I think, (haven't read it all, though). But 
I've got errors with some of the date times not being able to change 
them with int's values.

task.d(44): Error: function std.datetime.DateTime.month () const is not 
callable using argument types (int)
task.d(44): Error: cannot implicitly convert expression (month0) of type 
int to Month

-JoelCNZ

Oct 06 2011

Jonathan M Davis <jmdavisProg gmx.com> writes:

On Friday, October 07, 2011 19:58:12 Joel Christensen wrote:
 http://d-programming-language.org/intro-to-datetime.html

 
 Thanks Jonathan, that helped I think, (haven't read it all, though). But
 I've got errors with some of the date times not being able to change
 them with int's values.
 
 task.d(44): Error: function std.datetime.DateTime.month () const is not
 callable using argument types (int)
 task.d(44): Error: cannot implicitly convert expression (month0) of type
 int to Month

Month is an enum. So, any function taking a month must take an enum value, not 
an integer. e.g. Month.jan, Month.feb, Month.mar, etc. If you want to pass it 
an integral value, you have to cast. e.g. cast(Month)1, cast(Month)2, 
cast(Month)3, etc.

- Jonathan M Davis

Oct 24 2011

Luke Picardo <Picardo12 mail.com> writes:

On Monday, 24 October 2011 at 15:29:41 UTC, Jonathan M Davis 
wrote:
 On Friday, October 07, 2011 19:58:12 Joel Christensen wrote:
 http://d-programming-language.org/intro-to-datetime.html

 
 Thanks Jonathan, that helped I think, (haven't read it all, 
 though). But I've got errors with some of the date times not 
 being able to change them with int's values.
 
 task.d(44): Error: function std.datetime.DateTime.month () 
 const is not
 callable using argument types (int)
 task.d(44): Error: cannot implicitly convert expression 
 (month0) of type
 int to Month

 Month is an enum. So, any function taking a month must take an 
 enum value, not an integer. e.g. Month.jan, Month.feb, 
 Month.mar, etc. If you want to pass it an integral value, you 
 have to cast. e.g. cast(Month)1, cast(Month)2, cast(Month)3, 
 etc.

 - Jonathan M Davis

Why is it so hard to simply get the current date and time 
formatted properly in a string?

There are no examples of this in your documentation yet this is 
probably one of the most used cases.

Jun 30 2016

Zekereth <viserion.thrall gmail.com> writes:

On Thursday, 30 June 2016 at 21:18:22 UTC, Luke Picardo wrote:
 Why is it so hard to simply get the current date and time 
 formatted properly in a string?

 There are no examples of this in your documentation yet this is 
 probably one of the most used cases.

To get the current time, use Clock.currTime. It will return the 
current time as a SysTime. To print it, toString is sufficient, 
but if using toISOString, toISOExtString, or toSimpleString, use 
the corresponding fromISOString, fromISOExtString, or 
fromSimpleString to create a SysTime from the string.

auto currentTime = Clock.currTime();
auto timeString = currentTime.toISOExtString();
auto restoredTime = SysTime.fromISOExtString(timeString);

Jul 01 2016

Joel <joelcnz gmail.com> writes:

On Friday, 1 July 2016 at 15:28:04 UTC, Zekereth wrote:
 On Thursday, 30 June 2016 at 21:18:22 UTC, Luke Picardo wrote:
 Why is it so hard to simply get the current date and time 
 formatted properly in a string?

 There are no examples of this in your documentation yet this 
 is probably one of the most used cases.

 To get the current time, use Clock.currTime. It will return the 
 current time as a SysTime. To print it, toString is sufficient, 
 but if using toISOString, toISOExtString, or toSimpleString, 
 use the corresponding fromISOString, fromISOExtString, or 
 fromSimpleString to create a SysTime from the string.

 auto currentTime = Clock.currTime();
 auto timeString = currentTime.toISOExtString();
 auto restoredTime = SysTime.fromISOExtString(timeString);

This is what I use:

	auto getDateTimeString() {
		import std.string;
		import std.datetime;
		
		DateTime dateTime = cast(DateTime)Clock.currTime();
		with(dateTime)
		{
			return format(
				"%s " // day of the week (eg. 'Saturday')
				"%s.%02s.%s " // date, month, year
				"[%s:%02s:%02s%s]", // hour:minute:second am/pm
				split("Sunday Monday Tuesday Wednesday Thursday Friday 
Saturday")[dayOfWeek],
				day, cast(int)month, year,
				hour == 0 || hour == 12 ? 12 : hour % 12, minute, second, 
hour <= 11 ? "am" : "pm");
		}
	}

Aug 22 2016

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digitalmars.D.learn - Get current date and time with std.datetime