CppCon 2017: Juan Pedro Bolivar Puente “Postmodern immutable data structures”

Hey. Check out Juan Pedro Bolivar Puente's talks om value oriented design. He worked on Ableton which is a large application. He specifically speaks to Undo. He describes a much better pattern than the Command Pattern. He also released his source for Value Oriented Data structures Juan Pedro is a next level programmer who I think has pushed the craft forward through his work on bringing Value Oriented Design into the C++ world. Talk I [VIDEO] Talk II [LINK] Data Structures: [LINK] Application Structure: [LINK] Text Editor: [LINK] Good luck.

In case anyone hasn't seen it this CppCon talk [VIDEO] talks about rrb-trees and how they're a great data structure for writing a text editor that can handle unlimited sized documents without locking up, and allows for editing while saving and opening, and an easy way to support an undo command. Most text editors today do not support such functionality. With lockless data structures like an rrb-tree it becomes easy. It really is an ideal way to do write a text editor.

Not a benchmark but rrb-trees are pretty neat. They give an effective O(1) for all operations. Modern languages like Scala's Vector type is an rrb-tree under the hood: [LINK] For more fun: [VIDEO]

Mmm tasty. If anyone wants a backstory building up to this data structure checkout this talk: [VIDEO] He builds an rrb-tree which uses the same underlying concepts ALEX uses, just without the ML-enhancement.

Immer [0][1] seems like a really serious attempt at bringing high-quality persistent data structures to C++. [0]: [VIDEO] [1]: [LINK]

You might be interested in ewig and immer by Juan Pedro Bolivar Puente: [LINK] [LINK] See the author instantly opening a ~1GB text file with async loading, paging through, copying/pasting, and undoing/redoing in their prototype “ewig” text editor about 27 minutes into their talk here: [VIDEO] It’s backed by a “vector of vectors” data structure called a relaxed radix balanced tree: [LINK] That original paper has seen lots of attention and attempts at performance improvements, such as: [LINK] [LINK]

> [...] which is a must for anything performance oriented. But that's also not really true. Using functional data structures it is possible to write highly performant software. Check out for example "CppCon 2017: Juan Pedro Bolivar Puente - Postmodern immutable data structures"[1], an impressive talk, in which someone shows their developed editor that can edit huge text files without lag faster than any mainstream editor today. This is enabled by functional data structures. Usage of functional data structures throughout a project also ensures, that parts can be trivially parallelized, which is not true for traditional algorithms, and therefore can easily scale with number of CPUs available. For more on that subject, you might want to watch a few Joe Armstrong talks. Rust achieves type safety by introducing more language concepts like ownership, borrowing, and lifetimes, to formalize, who has access when and how. It also creates things as immutable by default, unless you make use of `mut`. Unfortunately, Rust's philosophy is shared memory and making shared memory access safe, rather than message passing, which is at odds with FP. [1]: [VIDEO]

My most popular open-source project [1] I talk about at conferences, mostly C++ ones (last example [2]). I was lucky to also land a paper about it at ICFP'17 [3]. On Friday I will talk at the MeetingCpp conference in Berlin about a new library I am building (kind of experimental Redux for C++ with time-travelling debugger!). I work as a freelancer and at the moment I do client work 3 days a week and dedicate the rest of the time to the open-source work. The open-source work includes doing research and implementing these tools, but also preparing the talks, which is a very time consuming task for me. Doing conference talks is very emotionally exhausting, I dread the previous weeks to the talk---but the feeling afterwards is very good and it is a good way to get exposure, I hope. My dream is to some day form a social company with a coop structure that works full-time on open-source, either directly or indirectly helping clients use these tools in their system. I hope I am set up in the right direction. Recently I opened a Twitter account to talk mostly about my open-source stuff [1]. I admittedly hate Twitter as a social network, but I've been convinced that it is a good place for networking in our industry, so I just play the game. I keep telling myself that I should open blog too, but then I realize that one can't simply do everything all the time, so I guess maybe I'll never do it. To your last question: is it unfair to not do marketing to your work? Totally not. Just do wha