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Gordon Brander gordonbrander

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gordonbrander / dirty.js
Last active Jan 16, 2021
dirty.js - dirty marking for any JS object
View dirty.js
const $dirty = Symbol('dirty keys')
const getOrCreateDirtyKeys = object => {
if (object[$dirty] == null) {
object[$dirty] = new Set()
return object[$dirty]
// Is object dirty?
View state-element.js
const $state = Symbol('state')
const $shadow = Symbol('shadow')
// StateElement is a deterministic web component,
// inspired loosely by Elm's App Architecture pattern.
// To use, extend this class and override the static methods.
export class StateElement extends HTMLElement {
static flags(el) {
const flags = el.getAttribute('flags')
if (flags) {
View stamp.js
// Stamp out an element by cloning a template and writing values into it using a function.
export const stamp = (write, string) => {
const temp = template(string)
const create = (model, handle) => {
const fragment = temp.content.cloneNode(true)
write(fragment, model, handle)
return fragment
return create
gordonbrander /
Last active Jan 4, 2021
microview - data-driven views that render once per frame, at most


What if... Virtual DOM... but by hand?
aha ha, just kidding...
unless.. ?

Microview is a tiny library for writing efficient data-driven DOM rendering logic by hand. DOM writes are driven by a pure data model. Using Microview, you can freely "bash the dom". Writes will be batched — they'll only happen once per animationframe, and only if the data model changes.

gordonbrander / framescheduler.js
Created Oct 20, 2020
FrameScheduler - a frame scheduler that will call callback at most once per frame.
View framescheduler.js
// Creates a frame scheduler that will call callback at most once per frame.
export const FrameScheduler = callback => {
let isScheduled = false
const draw = t => {
isScheduled = false
const schedule = () => {
gordonbrander / contract.js
Last active Feb 10, 2020
Racket-style contracts code sketch
View contract.js
// Simple runtime type checking.
export class ContractViolation extends Error {}
export const contract = predicate => value => {
if (predicate(value)) {
return value
} else {
throw new ContractViolation(
`Contract violation. Expected ${predicate}. Given ${value}.`
gordonbrander / starting.yaml
Created May 12, 2019
Starting - creative prompts
View starting.yaml
# Prompts for beginning new projects
- "#5ps#"
- "#heart#"
- "#disirability_feasibility_viability#"
- "#practical_step#"
- "#build#"
- "#story#"
- "#ooda#"
gordonbrander /
Last active Feb 21, 2019
Tolstoy, A Confession (Epilogue)

Leo Tolstoy, A Confession — Epilogue

Here is the dream: I see that I am lying in bed. Feeling neither good nor bad, I am lying on my back. But I begin to wonder whether it is a good thing for me to be lying there; and it seems to me that there is something wrong with my legs; whether they are too short or uneven, I do not know, but there is something awkward about them. As I start to move my legs, I begin to wonder how and on what I am lying, something that up till now had not entered my mind. Looking about my bed, I see that I am lying on some cords woven together and attached to the sides of the bed. My heels are resting on one of the cords and my lower legs on another in an uncomfortable way.

Somehow I know that these cords can be shifted. Moving one leg, I push away the furthest cord. It seems to me that it will be more comfortable that way. But I have pushed it too far away; I try to catch it, but this movement causes another cord to slip out from under my legs, leaving them hanging down. I rearran

gordonbrander /
Last active Feb 14, 2019 — script to filter text based on how "texty" it is


Example using pdfminer to extract text and then filter out lines that aren't "texty" enough. something.pdf | ./ > temp.txt

For example, I'm personally using this to extract the text of the IPCC report on 1.5°C:

gordonbrander / rest.js
Last active Sep 14, 2018
rest - decorate functions so you can bind "rest" arguments with
View rest.js
// Decorate a function with a method that allows you to bind "rest" args
// (everything except the first argument).
// Usage:
// const f = rest((a, b, c) => a + b + c)
// const fbc ="b", "c")
// fbc("a")
// // "abc"
const rest = f => { = ( => v => f(v,