Leo Liang aleung

Pure ESM package

The package that linked you here is now pure ESM. It cannot be require()'d from CommonJS.

This means you have the following choices:

Use ESM yourself. (preferred)
Use import foo from 'foo' instead of const foo = require('foo') to import the package. You also need to put "type": "module" in your package.json and more. Follow the below guide.
If the package is used in an async context, you could use await import(…) from CommonJS instead of require(…).
Stay on the existing version of the package until you can move to ESM.

Moving from lodash/fp to ramda

How

Good news is we're only using lodash/fp, which makes it easier to match function signatures.

Find most-used lodash methods, we'll convert these first maybe?
Go through each lodash method, find the ramda equivalent where possible
Write a codemod to rewrite those usages
Who the fuck thought function aliases were a good idea

Controlling the Brother P-Touch Cube label maker from a computer

The Brother PTP300BT label maker is intended to be controlled using the official Brother P-Touch Design & Print iOS/Android app. The app has arbitrary limits on what you can print (1 text object and up to 3 preset icons), so I thought it would be a fun challenge to reverse engineer the protocol to print whatever I wanted.

Python code at the bottom if you want to skip the fine details.

Process

Intitially I had a quick peek at the Android APK to see if there was any useful information inside. The code that handles the communication with the printer in Print&Design turned out to be a native library, but the app clearly prepares a bitmap image and passes it to this native library for printing. Bitmaps are definitely something we can work with.

Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

Prerequisites

lodash v4.17.20

The Ultimate Unit Testing Cheat-sheet

Sinon Chai
Chai
Sinon

	function get(path, obj, fb = `$\{${path}}`) {
	return path.split('.').reduce((res, key) => res[key] \|\| fb, obj);
	}

	function parseTpl(template, map, fallback) {
	return template.replace(/\$\{.+?}/g, (match) => {
	const path = match.substr(2, match.length - 3).trim();
	return get(path, map, fallback);
	});
	}

	For

	* ES5
	* ES6
	* CoffeeScript

	const I = x => x
	const K = x => y => x
	const A = f => x => f (x)
	const T = x => f => f (x)
	const W = f => x => f (x) (x)
	const C = f => y => x => f (x) (y)
	const B = f => g => x => f (g (x))
	const S = f => g => x => f (x) (g (x))
	const S_ = f => g => x => f (g (x)) (x)
	const S2 = f => g => h => x => f (g (x)) (h (x))

	#!/bin/bash

	dest_dir="output"
	dest_layer="shape_file"

	mkdir -p "${dest_dir}"

	i=0
	for src_file in source/*.shp ; do
	echo "Reading ${src_file}"