Re: Beerconf June 2023
On 6/22/23 10:34 PM, Steven Schveighoffer wrote: YuQian has asked that I post the abstract for the talk being given. A reminder that the talk is on Saturday at 19:00 UTC. ## Stop inheriting data fields! Hi everyone, I recorded this presentation and put a video about it on youtube (with YuQian's permission). If you missed it during beerconf you can watch it here. https://www.youtube.com/watch?v=8Ck0SgLKNcc -Steve
Re: Beerconf June 2023
On Saturday, 24 June 2023 at 22:52:01 UTC, Chris Katko wrote: Will there be a YouTube/whatever mirror of the conference afterward? most the weekend is just a handful of random people coming and going at random times and talking about random stuff more of just like a online hang out than anything formal.
Re: Beerconf June 2023
On 6/24/23 6:52 PM, Chris Katko wrote: On Saturday, 24 June 2023 at 22:43:50 UTC, Steven Schveighoffer wrote: On 6/24/23 9:01 AM, Richard (Rikki) Andrew Cattermole wrote: Linkity link link https://meet.jit.si/Dlang2023JuneBeerConf Unfortunately, we were getting some spam joiners. So if you want to join, the password is now `DlangRox` Will there be a YouTube/whatever mirror of the conference afterward? I have recorded the talk, and I will post a video at some point. But it's just the talk that was presented. -Steve
Re: Beerconf June 2023
On Saturday, 24 June 2023 at 22:43:50 UTC, Steven Schveighoffer wrote: On 6/24/23 9:01 AM, Richard (Rikki) Andrew Cattermole wrote: Linkity link link https://meet.jit.si/Dlang2023JuneBeerConf Unfortunately, we were getting some spam joiners. So if you want to join, the password is now `DlangRox` -Steve Will there be a YouTube/whatever mirror of the conference afterward?
Re: Beerconf June 2023
On 6/24/23 9:01 AM, Richard (Rikki) Andrew Cattermole wrote: Linkity link link https://meet.jit.si/Dlang2023JuneBeerConf Unfortunately, we were getting some spam joiners. So if you want to join, the password is now `DlangRox` -Steve
Re: Beerconf June 2023
On 6/22/23 10:34 PM, Steven Schveighoffer wrote: On 6/11/23 4:48 PM, Steven Schveighoffer wrote: # BEERCONF! Beerconf for June is happening 2 weeks from now, on the 24-25. A reminder that this is happening in 2 days! YuQian has asked that I post the abstract for the talk being given. A reminder that the talk is on Saturday at 19:00 UTC. Just a reminder that this talk is happening, in about 5 minutes. -Steve
Re: Beerconf June 2023
Linkity link link https://meet.jit.si/Dlang2023JuneBeerConf
Re: Beerconf June 2023
On 6/22/23 10:34 PM, Steven Schveighoffer wrote: On 6/11/23 4:48 PM, Steven Schveighoffer wrote: # BEERCONF! Beerconf for June is happening 2 weeks from now, on the 24-25. A reminder that this is happening in 2 days! YuQian has asked that I post the abstract for the talk being given. A reminder that the talk is on Saturday at 19:00 UTC. YuQian also would like to mention that the work presented is patent pending as disclosed in the original paper pdf: https://github.com/joortcom/DDIFI/blob/main/ddifi.pdf -Steve
Re: Beerconf June 2023
On 6/11/23 4:48 PM, Steven Schveighoffer wrote:
# BEERCONF!
Beerconf for June is happening 2 weeks from now, on the 24-25.
A reminder that this is happening in 2 days!
YuQian has asked that I post the abstract for the talk being given. A
reminder that the talk is on Saturday at 19:00 UTC.
See you there!
-Steve
## Stop inheriting data fields!
A new design pattern DDIFI (Decoupling Data Interface From data
Implementation) as a clean and general solution to multiple inheritance
### Abstract
Traditionally in class based OOP languages, both the fields and methods
from the super-classes are inherited by the sub-classes. However this
may cause some serious problems in multiple inheritance, e.g. most
notably the diamond problem. In this paper, we propose to stop
inheriting data fields as a clean and general solution to such problems.
We first present a design pattern to cleanly achieve multiple
inheritance in C++, which can handle class fields of the diamond problem
exactly according to the programmers’ intended application semantics. It
gives programmers flexibility when dealing with the diamond problem for
instance variables: each instance variable can be configured either as
one joined copy or as multiple independent copies in the bottom class.
The key ideas are:
1. decouple data interface from data implementation;
2. in the regular methods implementation use virtual property methods
instead of direct raw fields; and
3. after each semantic branching add (and override) the new semantic
assigning property.
Then we show our method is general enough, and also applicable to any
OOP languages that natively support multiple inheritance (e.g. C++,
Python, Eiffel, etc.), or single inheritance languages that support
default interface methods (e.g. Java, C# etc.).
For example, in the diamond inheritance problem of Faculty, and ResearchAssistant>,
we want to achieve the ideal application semantics: each
ResearchAssistant should only have:
* one (joined) copy of `_name` field, but
* two (separated) different address fields:
- one `_student_addr` ("dorm") as Student to takeRest(), and
- one `_faculty_addr` ("lab") as Faculty to doBenchwork()
Our new design pattern can achieve this.
Also it works for the current D! although it's a bit hackish. With
default interface methods it will be better (less convoluted).
(ref: https://github.com/joortcom/DDIFI/blob/main/d/MI.d)
### Speaker Bio
Ph.D Oxford Univ.; previous Google engineer; startup founder.
Re: Beerconf June 2023
On 6/11/23 4:48 PM, Steven Schveighoffer wrote: # BEERCONF! Beerconf for June is happening 2 weeks from now, on the 24-25. Just a quick update for this weekend's Beerconf, YuQian Zhou has contacted me about presenting on a new design pattern called DDIFI - Decoupling Data Interface From data Implementation. Presented as a clean and general solution to multiple inheritance. There is demo code for both C++ and Java, and the hope is that D can find use for it. YuQian has agreed to join us for Beerconf and show the presentation on Saturday at 19:00 UTC! I'll ping again this week to remind everyone, and ping again when this presentation starts. See you then! -Steve
Beerconf June 2023
# BEERCONF! Beerconf for June is happening 2 weeks from now, on the 24-25. Wow, only a couple more months until dconf, can't wait to see everyone again! If you haven't booked yet, the early bird window is closing! https://dconf.org/2023/index.html Want a beerconf T shirt? We know you do. https://www.zazzle.com/store/dlang_swag/products?cg=196874696466206954 ## What is beerconf? Check out the [wiki article](https://wiki.dlang.org/Beerconf). ## Presentations? As always, I'm interested in having people present some topic. If you have something you want to reserve a time for, please send me a message in any of the channels (here, email, discord, slack, etc.) and I'll make sure to announce it. Last month was a nice Q session with Mike talking about the IVY system. Thanks to him for coming on and sharing! Cheers! -Steve
