janneh’s gists

janneh / fibonacci.js

Created November 17, 2015 21:20

Javascript generator function for infinite fibonacci

	function* fibonacci() {
	let x = 0
	let y = 1

	yield x
	yield y

	while (true) yield x < y ? x = x + y : y = x + y
	}

janneh / generate-icons.md

Created May 13, 2016 08:52

OS X - generating .incs from 1024 x 1024 png file

mkdir icons.iconset
sips -z 16 16     icon1024.png --out icons.iconset/icon_16x16.png
sips -z 32 32     icon1024.png --out icons.iconset/[email protected]
sips -z 32 32     icon1024.png --out icons.iconset/icon_32x32.png
sips -z 64 64     icon1024.png --out icons.iconset/[email protected]
sips -z 128 128   icon1024.png --out icons.iconset/icon_128x128.png
sips -z 256 256   icon1024.png --out icons.iconset/[email protected]
sips -z 256 256   icon1024.png --out icons.iconset/icon_256x256.png
sips -z 512 512 icon1024.png --out icons.iconset/[email protected]

janneh / cache.js

Created June 1, 2016 05:15

Simple cache

	const cache = new Map()

	service.get = uri => {
	if (!cache.has(uri)) {
	cache.set(uri, fetch(uri))
	}

	return cache.get(uri)
	}

janneh / package.json

Created June 10, 2016 09:24

Node with async await using babel-node

	{
	"babel": {
	"plugins": [
	"transform-es2015-modules-commonjs",
	"syntax-async-functions",
	"transform-async-to-generator"
	]
	},
	"devDependencies": {
	"babel-plugin-transform-es2015-modules-commonjs": "6.8.0",

janneh / unit-test.js

Created July 1, 2016 07:52

Unit test template for JS

	import test from 'tape';

	test('What component aspect are you testing?', assert => {
	const actual = 'What is the actual output?';
	const expected = 'What is the expected output?';

	assert.equal(actual, expected, 'What should the feature do?');

	assert.end();
	});

janneh / index.html

Created October 28, 2016 06:57

Base playing around with testing redux-observable

	<!DOCTYPE html>
	<html>
	<head>
	<script src="https://unpkg.com/redux@^3.5.2/dist/redux.min.js"></script>
	<script src="https://unpkg.com/@reactivex/[email protected]/dist/global/Rx.js"></script>
	<script src="https://unpkg.com/redux-observable/dist/redux-observable.min.js"></script>
	<meta charset="utf-8">
	<title>JS Bin</title>
	</head>
	<body>

janneh / flux-standard-action.ts

Created October 30, 2016 20:16

Flux standard action interface

	interface FluxStandardAction {
	type: string \| symbol \| any;
	payload?: any;
	error?: boolean \| any;
	meta?: any
	}

janneh / parse.js

Created November 28, 2016 21:01

Parse Authorization Bearer Header

	const parseAuthorizationBearer = req => {
	if (!req.headers.authorization) return
	const headerParts = req.headers.authorization.split(' ')
	if (headerParts[0].toLowerCase() === 'bearer') return headerParts[1]
	}

janneh / jwt-auth.js

Last active November 29, 2016 10:52

Auth middleware for JWT:s

	// `jwt` is the encoded JSON Web Token
	// `token` is the decoded jwt

	// jwtFromRequest(req: Request): String
	// algorithmFromToken(token: Object): String
	// keyFromToken(token: Object): Promise<key: string>

	const auth = fucntion({ jwtFromRequest, keyFromToken, algorithmFromToken }) {
	return (req, res, next) => {
	const jwt = jwtFromRequest(req)

janneh / output.js

Last active December 28, 2016 23:06

dispatch logic

	function output(a, b, format = 'text') {
	const dispatchTable = {
	"text": textOutput,
	"html": htmlOutput
	}

	if (dispatchTable[format] === undefined) {
	throw new Error(`unknown format ${format}`)
	}

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