dustingetz

virtual scroll over node_modules v2 — Electric Clojure

• Direct filesystem reads from the view
• Direct function composition in the style of PHP, despite network
• No API, no client side database, no frontend state at all (except DOM), no frontend/backend.
• Literally all accidental complexity GONE
• 100% of server data sync is managed by Electric
• Rows have arbitrary server local data access, here querying file metadata #clojure
• Optimized and no scroll jank – DOM elements are fixed in place and reused

dustingetz

Proof of client/server transfer — Electric Clojure

Electric Clojure lets you code frontend/backend expressions that compose across the client/server boundary, due to compiler-managed network powered by DAGs. #Clojure

20230131.hello.photon.tranasfer.2.edited.mp4

• p/defn defines a function that follows all the same laws as regular Clojure functions, but it’s actually a macro that compiles the function body into a DAG (Directed Acyclic Graph).

dustingetz

List of Photon demos and content

Photon is a network-transparent Clojure/Script dialect for full-stack web application development. It uses macros to let you interweave client and server code in a single .CLJC file, so you can define a full-stack frontend/backend webapp all in one place. Photon is designed for stateful full-stack web applications with complex frontend/backend data sync requirements.

Newest demos:

• Datomic web explorer (Oct 2022)

Personal favorites:

• Photon infinite scroll over node_modules v2

dustingetz

(ns dustin.y2021.missionary_promise
  (:require [hyperfiddle.rcf :as rcf :refer [tests % !]]
            [missionary.core :as m]))

; We want to turn a promise-thing into a Task
; Leo: The problem with Promise and CompletableFuture is no cancellation
; What task do we want? Is the task listening to the promise? Or is the task the process backing the promise?
; Background: when you get a promise, there is a process in the background which eventually completes the promise.
; Do you want to await the result of an already running promise
; or do you want to run the process of the promise when the task is run?

dustingetz

HOWTO install #user/uri reader extension in Clojure/Script

We use #user/uri rather than unquaified #uri per Alex Miller comment in the Ask Clojure thread.

License: public domain

dustingetz

(defmacro future
  "Takes a body of expressions and yields a future object that will
  invoke the body in another thread, and will cache the result and
  return it on all subsequent calls to deref/@. If the computation has
  not yet finished, calls to deref/@ will block, unless the variant of
  deref with timeout is used. See also - realized?."
  {:added "1.1"}
  [& body] `(future-call (^{:once true} fn* [] ~@body)))
​
(defn future-call

dustingetz

Live-coding demo of #Hyperfiddle UI modeling language

• forms, tables, hyperlinks, routing
• queries on backend, rendering on frontend
• dynamic query dependencies
• WYSIWYG in-browser live editor

Strong composition – it's a functional expression! Compiler-managed network

dustingetz

Datomic database transaction browser coded in Photon, by nottmey

This fullstack web app is 239 LOC in a single file, coded with just fns in the straightforward/easy style of PHP. All client/server I/O is managed!

It took him 10 hours. Thank you Malte! #Clojure

20220529.Photon.Datomic.Viewer.-.Malte.Nottmeyer.mp4

dustingetz

10k dom elements with Photon

• Plus free multiplayer of course
• 25 LOC of which 48% are requires, CSS and whitespace. Count it!

20220823.10k.dom.elements.pixel.game.multiplayer.mp4

dustingetz

Photon demo: database branching (time travel)

• This demo uses DataScript's API for speculative transactions, not sure if can be done with sql read transactions.
• DataScript is on the server; code is network-transparent.
• 100 LOC for everything (table, query, popover, css, page)

20220910.branched.popover.staging.area.2.mp4