James Kusachi jkusachi

WTF Flow

[Flow][] static type checker is a wonderful attempt to bring [algebric data types][] to JS. It is still fairly new project and there for has few WTFs that can pull you down the rabbit hole. This document is attempt to document things that may seem like a WTF from the perspective of JS developer who tries to employ static type checker, or in other words, some items on the list may be very subjective & based on the background of the writer.

Polymorphic type that is a function

It is very likely that one will wind up using [Polymorphic functions][] to solve a more general problem. And if you define type alias for such a function you may be puzzled what is the right syntax should be used for such type definition.

Let's start with:

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	final class UserData: ObservableObject {
	@Published var image: UIImage? = nil
	}

	struct ContentView: View {
	@EnvironmentObject var userData: UserData
	@State var pickerIsActive: Bool = false

	var body: some View {
	NavigationView {

	import * as React from 'react';
	import {
	Field as FormField,
	InjectedFormProps,
	reduxForm,
	} from 'redux-form';

	interface CustomProps {
	customText: string;
	}

	function createElement(tag, props = {}, ...children) {
	const element = document.createElement(tag);
	const listeners = [];

	Object.keys(props).forEach((key) => {
	if (key.slice(0, 2) === 'on') {
	const event = key.slice(2).toLowerCase();
	element.addEventListener(event, props[key]);
	listeners.push(() => element.removeEventListener(event, props[key]));
	} else if (key === 'ref' && typeof props[key] === 'function') {

	var master = {
	data: {
	values: [1, 2, 3],
	labels: ["one", "two", "three"],
	food: {
	name: "pizza"
	},
	groups: [
	{
	brand: 'zillow',

	#!/bin/bash

	sudo apt-get remove phantomjs

	sudo unlink /usr/local/bin/phantomjs
	sudo unlink /usr/local/share/phantomjs
	sudo unlink /usr/bin/phantomjs

	cd /usr/local/share

	#301 Redirects for .htaccess

	#Redirect a single page:
	Redirect 301 /pagename.php http://www.domain.com/pagename.html

	#Redirect an entire site:
	Redirect 301 / http://www.domain.com/

	#Redirect an entire site to a sub folder
	Redirect 301 / http://www.domain.com/subfolder/