User:Will Gajate

Linked-in | https://www.linkedin.com/in/wgajate/

other pages

TryJ

JourneyThroughJ

FoldVariants

Wiki improvement project

Meeting 1: (11/18/2021)

Updating old content (to accommodate updates in the J language or to make it more relevant/easy to consume)

Categorize wiki pages with the purpose of find pages in need of updating or retirement/archival.

Increasing audience/user base and improving search features

Improve how new/existing users find solutions to their questions
Improve how people learn about J and progress through the language

solutions: create weekly newsletter, ebooks of content, with links back to the wiki.

Wiki development

Reward wiki contributors (gamefication features: badges, votes)
Make it easy for users to identify and take on wiki clean up work

solutions: utilize stackoverflow and reddit gamefication features. build stackoverflow site.

Meeting 2: (12/2/2021)

Attendance: Bob T., Art A., Henry R., Michal Wallace(J early show), Will G.

Reconstruct landing page to provide newcomers with a guided path (runway) for finding the right place to start learning the language.
Define group/subject general interest areas (backbone to hang pages on) : Necommer's area| Essays | ... , this structure will give us a target for organizing/categorizing pages.

  * General student of array languages
  * Data Scientist
  * Quantitative developer
  * Web developer
  * Database developer
  * Installing J (detailed instructions per platform)

Newcommer pages could have a different color background
For outdated pages, a banner could alert page viewers that the content is outdated (community suggestion)

Feature Ideas:

Implementing J labs with Jupyter Notebooks (needs J to work with Jupyter Notebook kernel)
Executable J code in the browser, to make interactive tutorials on the wiki.
Syntatic highlighting for J code snippets on wiki (need to install plug-in for media wiki)
Special J font type -> @ sign would look smaller (more like the mathematical symbol)
Web Assembly (wasm) compilation of J engine - for running J in the browser (client-side) safely and cheaply. Server does not pay compute costs since J code executed on client side.
J plugin for Visual Studio Code
J 6.02 Reference Card to be updated to J 9.++ by Rick

Meeting 3: (12/16/2021)

Attendance: Bob T., Art A., Raul M. , Jonathan Hough, Will G.

Near-term goals (targeting end-of-February):

Introductory J videos (for new users)
- A good example of introductory videos for the q/kdb language is Jeff Borror's Q KDB videos
Draft of new front-page (possibly via Redirect)
New Wiki feature: "Try J" - browser-based J console with labs (Will G., Jon H., Michael W. to tackle)
- Web-based J Console Demo Joe Bogner, Michael Wallace in the forums (perhaps we can replicate and update the console to new J version, then embed in wiki)
  - Joe Bogner built browser J console with Web Assembly
- J console server, not ideal for embedding from wiki.
- Blender J Jupyter notebook, takes a 5 minutes to spin up notebook.
- Can the J labs be incorporated into the "Try J" playground on the wiki? (Bob T.)
How best to highlight the ASCII search feature (Advanced Search/Code Search)? (Bob T.
- Can we use a combination of the Media Wiki search and Chris Burke's J search?
- Can we include categories in search to allow searching within specific areas of the wiki?
What are other languages doing with their wikis. (Raul M.)
Can we develop an introduction to J for more experienced programmers as well as beginners? (Art A.)

Questions for further development:

How best to highlight or categorize essays?

Application: Folding Lists: Cashflow engine (deterministic case)

Fixed Income instruments (such as bonds and swaps), represent a major share of the world's capital markets. Investors seeking low risk securities value these instruments for their predictable cashflows.

The examples below deploy the new J fold primitives to contract a cashflow engine (i.e. code that translates payment rules into cashflow schedules) and classic risk measures.

in-progress

Application: Folding Trees: Cashflow engine (stochastic case)

In-progress