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jayphelps / settings.json
Last active March 28, 2022 17:10
Modifications on top of "Community Material Theme Palenight" Before and after:
// Modify your settings.json to add these. Customize further how you prefer.
"workbench.editor.highlightModifiedTabs": true,
"workbench.editor.tabCloseButton": "off",
"workbench.colorCustomizations": {
"editor.lineHighlightBackground": "#ffffff06",
"editor.foreground": "#acb3db",
"selection.background": "#89DDFF",
"progressBar.background": "#89DDFF",
"textLink.foreground": "#89DDFF",
jayphelps /
Created May 1, 2020 06:56
Add .crt SSL certificate to macOS Keychain via command line
SCRIPT="security add-trusted-cert -d -r trustAsRoot -p ssl -p basic -k /Library/Keychains/System.keychain "filename.crt""
osascript -e "do shell script \"$SCRIPT\" with administrator privileges"
# or you can just run the above SCRIPT command with sudo directly.
# This osascript stuff is so that you get a native OS password prompt
// The spec might seem somewhat convoluted but it's because you can actually
// use reduce on anything array-like not just arrays.
// e.g.'abc', (acc, char) => char + acc); // "cba"
function reduce(callback, initialValue) {
// In "strict mode" calling this with either null or undefined will make
// this === null in either case, as per spec.
if (this === null) {
throw new TypeError('reduce called on null or undefined');
// noprotect
const second = 1;
const minute = second * 60;
const hour = minute * 60;
const day = hour * 24;
const year = day * 365;
const unitValues = [{
jayphelps / redux-observable-typescript-testing-example.ts
Created February 24, 2019 05:33
Example using redux-observable + typescript + TestScheduler, with a run helper written
import { map, delay } from 'rxjs/operators';
import { TestScheduler } from 'rxjs/testing';
import { Action } from 'redux';
import { Epic, ofType, ActionsObservable, StateObservable } from 'redux-observable';
const scheduler = new TestScheduler((actual, expected) => {
if (JSON.stringify(actual) !== JSON.stringify(expected)) {
throw new Error(`Failing test
actual: ${JSON.stringify(actual, null, 2)}
jayphelps / gist:cfc66b39cdd45187df936fec545df447
Last active January 20, 2018 01:59
WebAssembly structured clone node.js v8 serialize deserialize "Unable to deserialize cloned data"
const v8 = require('v8');
const fs = require('fs');
function writeDemo() {
const module = new WebAssembly.Module(new Uint8Array([
0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00
const buffer = v8.serialize(module);
fs.writeFileSync('cached-wasm-module.buffer', buffer);
jayphelps / a.js
Last active April 26, 2018 15:38
Making abstractions for redux and redux-observable
// WARNING: Completely untested code. it might not work and/or it might have
// things that don't work well. Just made for illustrational purposes
// redux-observable shines the most with complex async stuff, like WebSockets
// but many of us will still use it for more modest things like AJAX requests.
// In these cases, there can be a ton of repetitive boilerplate. So this is a
// simple example of applying some abstractions and conventions to make it easier.
// THAT SAID, since abstractions cause indirection it can make it harder for
// someone to come along later and know how something works. Weigh the costs
// and remember, this example isn't a suggestion of the actual code you should
jayphelps / dispatchSwallowedError.js
Created October 17, 2017 07:28
in situations like tc39 Observable when it should "swallow" errors, but we still want to report them to window.onerror (HostReportErrors) and in the console
function dispatchSwallowedError(e) {
window.dispatchEvent(new ErrorEvent('error', {
error: e,
message: e.message
jayphelps / package.json
Last active June 29, 2024 15:53
TypeScript output es2015, esm (ES Modules), CJS, UMD, UMD + Min + Gzip. Assumes you install typescript (tsc), rollup, uglifyjs either globally or included as devDependencies
"scripts": {
"build": "npm run build:es2015 && npm run build:esm && npm run build:cjs && npm run build:umd && npm run build:umd:min",
"build:es2015": "tsc --module es2015 --target es2015 --outDir dist/es2015",
"build:esm": "tsc --module es2015 --target es5 --outDir dist/esm",
"build:cjs": "tsc --module commonjs --target es5 --outDir dist/cjs",
"build:umd": "rollup dist/esm/index.js --format umd --name YourLibrary --sourceMap --output dist/umd/yourlibrary.js",
"build:umd:min": "cd dist/umd && uglifyjs --compress --mangle --source-map --screw-ie8 --comments --o yourlibrary.min.js -- yourlibrary.js && gzip yourlibrary.min.js -c > yourlibrary.min.js.gz",
jayphelps / batchsampling.js
Last active August 18, 2022 23:27
Batch Sampling Example from my talk, Real-time Insights, powered by Reactive Programming
let buffer = getWebSocket()
let gate = new BehaviorSubject(true);
let batchSize = 50;
let batchSizeCounter = 0;
let results = gate
.switchMap(enabled => enabled ? buffer : Observable.never())
.do(buffer => {