dustingetz

Clojure namespace browser – Hyperfiddle example app

See source code below.

dustingetz

(ns dustingetz.y2025.gene2
  (:require [hyperfiddle.electric3 :as e]
            [hyperfiddle.electric-dom3 :as dom]
            [missionary.core :as m]))

(e/defn MyTextarea
  [v & {:keys [rows cols]
        :or {rows 10 cols 50}}]
  (dom/textarea (dom/props {:rows rows :cols cols :value v})
    ; this returns a stream of values

dustingetz

(ns dustingetz.edn-viewer0
  (:require [clojure.datafy :refer [datafy]]
            [clojure.core.protocols :refer [nav]]
            [contrib.data :refer [unqualify]]
            [dustingetz.easy-table :refer [TableScroll Load-css]]
            [dustingetz.flatten-document :refer [flatten-nested]]
            [hyperfiddle.electric3 :as e]
            [hyperfiddle.electric3-contrib :refer [Tap]]
            [hyperfiddle.electric-dom3 :as dom]
            [hyperfiddle.electric-forms0 :refer [Checkbox*]]

dustingetz

(ns hf-docs-site.demos.explorer
  (:require [clojure.datafy :refer [datafy]]
            [clojure.core.protocols :refer [nav]]
            #?(:clj clojure.java.io)
            [contrib.data :refer [treelister clamp-left]]
            [contrib.str :refer [includes-str?]]
            [contrib.datafy-fs #?(:clj :as :cljs :as-alias) fs]
            [hyperfiddle.electric3 :as e]
            [hyperfiddle.electric-dom3 :as dom]
            [hyperfiddle.electric-scroll0 :refer [Scroll-window IndexRing]]

dustingetz

(ns dustingetz.metaobject
  "https://github.com/NikolaySuslov/electric-objmodel"
  (:require [contrib.assert :refer [check]]
            [hyperfiddle.electric3 :as e]
            [hyperfiddle.electric-dom3 :as dom]
            [hyperfiddle.incseq :as i]))

(e/defn Some [xs] (first (e/as-vec xs)))

(e/defn Vtable-lookup [vtable mname]

dustingetz

(ns contrib.ui.remark
  (:require
    ;["@hyperfiddle/remark-generic-extensions/lib/browser.min" :as remark-generic-extensions] ; works in node
    [clojure.set]
    [clojure.string]
    ; Refrain from contrib imports so this is more suitable for userland
    [goog.object]
    [prop-types]                                            ; used as js/propTypes.object
    [reagent.core]
    ;[remark] ; works in node

dustingetz

References — Electric Clojure

Electric Clojure implements a form of arrowized continuous time dataflow programming with extensions for network-transparent function composition.

• The Haskell School of Music: From Signals to Symphonies (2018) — best starting point and also a great intro to Haskell.
• The Essence of Dataflow Programming (2006) great category theory overview of dataflow programming; missing Applicative (2008), Free monad and Cofree comonad
• Push-pull functional reactive programming, Elliot (2009)
• Breaking down FRP, Jane Street (2014) — good concise comparision of many FRP aspects; missing discussion of discrete vs continuous
• [Compiling to Categories, Elliott (2017)](http

dustingetz

Multiplayer chat with presence – Electric Clojure

• 60 LOC: demo_chat_exdended.cljc

20230131.presence.edited.mp4

dustingetz

Missionary concept map

Missionary primitives fit into three categories:

Effect descriptions = pure functional programming which is about trees not graphs

• continuous flow, m/?< (switch)
• m/watch, m/latest, m/cp
• m/observe
• m/reductions, m/relieve

dustingetz

PostgreSQL hello world — Electric Clojure

How do I integrate a SQL database backend?

Easy:

• make an ordinary Clojure function query-pokemon-list for the query
• The query is blocking, and Electric Clojure is async, so use e/offload to move it to a thread pool.
  • (Don't block the event loop!)
• e/offload throws Pending until the query finishes, and then the exception "goes away"