Hayden chbdetta

This is the follow up to a post I wrote recently called From Require.js to Webpack - Party 1 (the why) which was published in my personal blog.

In that post I talked about 3 main reasons for moving from require.js to webpack:

Common JS support
NPM support
a healthy loader/plugin ecosystem.

Here I'll instead talk about some of the technical challenges that we faced during the migration. Despite the clear benefits in developer experience (DX) the setup was fairly difficult and I'd like to cover some of the challanges we faced to make the transition a bit easier.

[10:57 PM] acemarke: so, the canonical "bad perf for React+Redux" example is a todo list of 10,000 items
[10:58 PM] Sinistral: I always thought passing an object through was just a typical JS pointer
[10:58 PM] acemarke: the trivially obvious store shape is a single array of all 10K todo objects
[10:58 PM] acemarke: with a single connected list component
[10:58 PM] Sinistral: eh, ignore me, finish
[10:59 PM] acemarke: the list's mapState retrieves the array, and the list component renders this.props.todos.map(todo => <TodoListItem todo={todo} /> )
[10:59 PM] acemarke: which works fine the first time around
[10:59 PM] acemarke: but if you edit, say, the "text" field in a single todo
[11:00 PM] acemarke: your reducer returns a new updated todo object inside of a new array reference, shallow-copied
[11:00 PM] Sinistral: You are re-drawing the enti...oh

How to automatically start ssh server on boot on Windows Subsystem for Linux

Microsoft partnered with Canonical to create Bash on Ubuntu on Windows, running through a technology called the Windows Subsystem for Linux. Below are instructions on how to set up the ssh server to run automatically at boot.

Edit the /etc/ssh/sshd_config file by running the command sudo vi /etc/ssh/sshd_config and do the following
1. Change Port to 2222 (or any other port above 1000)
2. Change PasswordAuthentication to yes. This can be changed back to no if ssh keys are setup.
Restart the ssh server:
- sudo service ssh --full-restart
With this setup, the ssh server must be turned on every time you run Bash on Ubuntu on Windows, as by default it is off. Use this command to turn it on:

Links

Workflow:

Node version manager on Windows: https://github.com/coreybutler/nvm-windows
Node version manager on Linux/macOS: https://github.com/nvm-sh/nvm
Docker and nodejs: https://hackernoon.com/a-better-way-to-develop-node-js-with-docker-cd29d3a0093

React and TypeScript:

Create a TypeScript based React app: https://create-react-app.dev/docs/adding-typescript
React + TypeScript cheatsheet: https://github.com/typescript-cheatsheets/react-typescript-cheatsheet

A compile-time 4-Bit Virtual Machine implemented in TypeScript's type system. Capable of running a sample 'FizzBuzz' program.

Syntax emits zero JavaScript.

type RESULT = VM<
  [
    ["push", N_1],         // 1
    ["push", False],       // 2
 ["peek", _], // 3

	import cv2
	import numpy as np
	import tensorflow as tf

	IMAGE_PATH = './cat.jpg'
	LAYER_NAME = 'block5_conv3'
	CAT_CLASS_INDEX = 281

	img = tf.keras.preprocessing.image.load_img(IMAGE_PATH, target_size=(224, 224))
	img = tf.keras.preprocessing.image.img_to_array(img)