Another scenario where :utc_now could be used is DateTime.after?(date, :utc_now)
*José Valimhttps://dashbit.co/ <https://dashbit.co/>* On Wed, Jan 8, 2025 at 1:57 PM Jon Rowe <m...@jonrowe.co.uk> wrote: > I'd love either of these proposals to be a reality, I often find myself > building my own helpers in tests to do this sort of thing. > > Initially I thought the function varient was better but if you look at it > as "then we might have to add all these other functions" I found myself > leaning towards allowing `:utc_now` as a placeholder in the existing api, > it might be slightly more verbose but it leans towards a more compact core > api overall... so that gets my +1. > > Cheers > Jon > > On Wed, 8 Jan 2025, at 11:06 AM, José Valim wrote: > > I'd love to see something along those lines but I can't pick a favorite. > > 1. Supporting :utc_now in "shift" could be a welcome addition, as we could > also support it in "add" and "diff" functions. However, I'd say it is more > verbose than from_utc_today. > > 2. from_utc_now/from_utc_today is clearer but less applicable. If we go > this route, we may find ourselves adding other functions, such as > `add_to_utc_now` and `diff_to_utc_now`. > > So I would love to hear everyone's thoughts. > > "Date.range/2" with a duration is a no-brainer though and we could add it > today. > > *José Valim* > https://dashbit.co/ > > > On Tue, Jan 7, 2025 at 5:43 PM Wojtek Mach <woj...@wojtekmach.pl> wrote: > > Hello, > > I'd like to propose adding the following functions: > > - `Date.from_utc_today(duration)` > - `NaiveDateTime.from_utc_today(duration)` > - `DateTime.from_utc_today(duration)` > > For example: > > # Say, now is ~U[2025-01-07 16:22:40.003901Z] > > iex> Date.from_utc_now(month: 1, day: 1) > ~D[2025-02-08] > > iex> NaiveDateTime.from_utc_now(hour: -1) > ~N[2025-01-07 15:22:40.003901] > > iex> DateTime.from_utc_now(Duration.new!(hour: 1)) > ~U[2025-01-07 17:22:40.003901Z] > > I believe they are especially useful when writing tests and they might > give opportunity for some optimizations. > > Another idea is to instead allow passing `:utc_today` / `:utc_now` to the > existing shift/2 functions: > > iex> Date.shift(:utc_today, month: 1, day: 1) > ~D[2025-02-08] > > iex> NaiveDateTime.shift(:utc_now, hour: -1) > ~N[2025-01-07 15:22:40.003901] > > iex> DateTime.from_utc_now(:utc_now, hour: 1) > ~U[2025-01-07 17:22:40.003901Z] > > Btw and this is a related but separate conversion, I think a > `Date.range(date, duration)` would be a nice addition. And so, I believe a > `Date.range(:utc_today, month: 1)` would be a natural extension of this. > I'm not sure if supporting `Date.add(:utc_today, 1)` and similar is worth > it, perhaps just for consistency. > > > -- > You received this message because you are subscribed to the Google Groups > "elixir-lang-core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elixir-lang-core+unsubscr...@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/elixir-lang-core/2851ea28-d20e-4e8d-b957-38a582f7fa39n%40googlegroups.com > <https://groups.google.com/d/msgid/elixir-lang-core/2851ea28-d20e-4e8d-b957-38a582f7fa39n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > > -- > You received this message because you are subscribed to the Google Groups > "elixir-lang-core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elixir-lang-core+unsubscr...@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/elixir-lang-core/CAGnRm4L9iSWc7zD8v_%2BqNhsOhx10atYksuPO5gbGCMvvz88sPA%40mail.gmail.com > <https://groups.google.com/d/msgid/elixir-lang-core/CAGnRm4L9iSWc7zD8v_%2BqNhsOhx10atYksuPO5gbGCMvvz88sPA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- > You received this message because you are subscribed to the Google Groups > "elixir-lang-core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elixir-lang-core+unsubscr...@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/elixir-lang-core/3952efd8-06a4-4855-9277-8208b5c8068f%40app.fastmail.com > <https://groups.google.com/d/msgid/elixir-lang-core/3952efd8-06a4-4855-9277-8208b5c8068f%40app.fastmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "elixir-lang-core" group. To unsubscribe from this group and stop receiving emails from it, send an email to elixir-lang-core+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/elixir-lang-core/CAGnRm4L0a1an-ehwWjCYuJr5dqO9dtMm%3Du0hsv5nt6uqHYbRzg%40mail.gmail.com.
