the Date object

[espruino-discuss]

Posted at 2017-06-08 by ancienthero

the js Date object is marvelous
https://www.w3schools.com/jsref/jsref_obj_date.asp

but it's espruino implementation is very limited so far, to be specific, we can only read from the Date object once it has been created.

>t = new Date;
=Date { "ms": 949363947471.30676269531 }
>t.setHours(10);
Uncaught Error: Function "setHours" not found!
 at line 1 col 3

Im working on a time switch, I've been using date class all around, finding out that set-methods are not implemented made me (almost :P ) depressed

setDate()	Sets the day of the month of a date object
setFullYear()	Sets the year of a date object
setHours()	Sets the hour of a date object
setMilliseconds()	Sets the milliseconds of a date object
setMinutes()	Set the minutes of a date object
setMonth()	Sets the month of a date object
setSeconds()	Sets the seconds of a date object

Extending espruino's Date class would be extremely beneficial:

1. easy, date, time manipulation - clocks, timers, time switches
2. clock module wouldn't be necessary
3. if it's about memory, we can add set-methods and remove some of these:

• function Date.getTimezoneOffset - doesn't make sense on espruino since it's always 0;
• Date.getTime() is almost identical with Date.now() and Date.now() makes more sense on embedded
• Date.toUTCString is kind of useless when our timezoneOffset is always 0

Let me know what do you think of it!

[gfwilliams]

Posted at 2017-06-09 by @gfwilliams

Thanks - I think on normal Espruino boards it could be added just fine without too many issues with memory. There's actually an issue open for this here: espruino/Espruino#504

I'll see what I can do - which board are you using?

[espruino-discuss]

Posted at 2017-06-09 by ancienthero

Im using espruino Pico.

I'm glad there is an open issue for that

Thanks!

[gfwilliams]

Posted at 2017-06-09 by @gfwilliams

Ok, I just added the setters. If you get one of the travis builds from here: https://www.espruino.com/binaries/travis/master/

Then you should be able to use them - let me know if they work ok.

[espruino-discuss]

Posted at 2017-06-09 by ancienthero

I've used this one https://www.espruino.com/binaries/travis/master/espruino_1v92.80_pico_1r3.bin

works like a charm!

 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v92.80 Copyright 2016 G.Williams
>
>t = new Date;
=Date { "ms": 949363217722.27758789062 }
>t.toString();
="Tue Feb 1 2000 00:00:17 GMT+0000"
>t.setHours(10);
=949399217722
>t.toString();
="Tue Feb 1 2000 10:00:17 GMT+0000"
>t.setMinutes(10);
=949399817722
>t.toString();
="Tue Feb 1 2000 10:10:17 GMT+0000"
>t.setFullYear(2022);
=1643710217722
>t.toString();
="Tue Feb 1 2022 10:10:17 GMT+0000"
>t.setDate(29);
=1646129417722
>t.toString();
="Tue Mar 1 2022 10:10:17 GMT+0000"
>t.setMonth(4);
=1651399817722
>t.toString();
="Sun May 1 2022 10:10:17 GMT+0000"
> 

Thank you!

[gfwilliams]

Posted at 2017-06-09 by @gfwilliams

No problem! If you go for an even more recent build, you'll find that there's an E.setTimeZone(..) function (taking a timezone in hours) that might be interesting for you as well.

[espruino-discuss]

Posted at 2017-06-20 by ancienthero

Yup E.setTimeZone(..) is nice
anyway I'm on 1v92.86 and I see travis at 1v92.111 now, is there something new worth mentioning? ;)

by the way, the new Date class with setters is amazing! it simplified my project a lot

[gfwilliams]

Posted at 2017-06-20 by @gfwilliams

Great! I don't think you'll gain much by updating at the moment, but you can always check:

https://github.com/espruino/Espruino/blob/master/ChangeLog