Andrew Walpole TCotton

🎯

Focusing

London-based software engineer

TCotton / briggs.hs

Created October 26, 2025 17:04

Use of every and superimpose

	d3
	$ every 4 ( superimpose
	( slice 2 (fast "2" "[1 2 3 4]" ) -- re-slice give variation of slight glitch
	. (\|+\| gain "0.1") -- slightly louder
	. ( # sound "bd*4") -- different sound from the bDrums
	))
	$ every 2 ( superimpose
	( (\|+\| gain "-0.2") -- slightly quieter
	. (0.25 <~) -- delay by 1/4 cycle
	. (slice 4 (fast "2" "[1 3 2 4]")) -- re-slice + rearrange

TCotton / fadetozero.hs

Created September 20, 2025 15:53

	let spread1 = (spread ($) [jux rev, rev])
	spread2 = spread ($) [density 2, rev, slow 2, striate 3, (# speed "0.8")]
	juxrev = jux rev
	revEffect = rev
	palindrom = palindrome
	fadeOut = range 1 0 $ slow 16 saw
	in d4 $ stack [(
	slow 2
	$ chop 32
	$ sound "piano_c"

TCotton / demo.hs

Last active September 19, 2025 17:19

Example of TidalCycle and as used on the YouTube demonstraton

	cps (120/60/4)

	-- drum patterns in do block

	do
	let drumz1 = every 4 (\|> sound "drum")
	$ sound "[drum <dr:2>] drum *2"
	# gain 0.7
	# orbit 0 -- routed to audiochannel 1-2
	let drumz2 = sound "[drum <dr:1>] drum [drum <techno:5>] drum /2"

TCotton / tidalCycle-example

Created September 10, 2025 14:56

TidalCycle example

	setcps (120/60/4)

	-- drum patterns in do block

	do
	let drumz1 = every 4 (\|> sound "drum")
	$ sound "[drum <dr:2>] drum *2"
	# gain 0.6
	# orbit 0
	let drumz2 = sound "[drum <dr:1>] drum [drum <techno:5>] drum /2"

TCotton / typescript-autocomplete.ts

Created August 19, 2025 07:26

typescript autocomplete

TCotton / not-enum.ts

Created August 19, 2025 05:55

Better TypeScript ENUMs

	const LOG_LEVEL = {
	DEBUG: "DEBUG",
	WARNING: "WARNING",
	ERROR: "ERROR",
	} as const
	type ObjectValues <T> = T[keyof T];
	type LogLevel = ObjectValues<typeof LOG_LEVEL>

TCotton / hook.js

Created May 17, 2021 10:55

Stale data invalidation

	const swr = new Map;

	const useSWR = (path, fetcher, cache) => {
	let [data, update] = useState(null);
	if (!swr.has(path) \|\| swr.get(path) !== cache) {
	fetcher(path).then(update, () => update(new Error(path)));
	swr.set(path, cache);
	}
	const isError = data instanceof Error;
	return {

TCotton / reduxsaga.js

Created May 17, 2021 10:49

Redux saga example

	// customer

	import { put, call } from 'redux-saga/effects';

	const fetch = (url, data) =>
	window.fetch(url, {
	body: JSON.stringify(data),
	method: 'POST',
	credentials: 'same-origin',
	headers: { 'Content-Type': 'application/json' }

TCotton / redux.js

Created December 8, 2020 16:17

Redux / Saga one

	// customer

	import { put, call } from 'redux-saga/effects';

	const fetch = (url, data) =>
	window.fetch(url, {
	body: JSON.stringify(data),
	method: 'POST',
	credentials: 'same-origin',
	headers: { 'Content-Type': 'application/json' }

TCotton / chapter_one.js

Created November 20, 2020 20:55

chapter one - react test

	import React from 'react';
	export const Appointment = ({customer: { firstName }}) => <div>{firstName}</div>;

	import React from 'react';
	import ReactDOM from 'react-dom'
	import { Appointment } from '../src/Appointment';
	let container;
	let component;
	const render = component => ReactDOM.render(component, container);
	describe("Appointment", () => {