The Alchemist The-Alchemist

An opinionated list of excellent Clojure learning materials

These resources (articles, books, and videos) are useful when you're starting to learn the language, or when you're learning a specific part of the language. This an opinionated list, no doubt. I've compiled this list from writing and teaching Clojure over the last 10 years.

🔴 Mandatory (for both beginners and intermediates)
🟩 For beginners
🟨 For intermediates

Stack Overflow trends

https://insights.stackoverflow.com/trends?tags=flutter%2Creact-native

Show notes - July 28, 2021

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Domain coming soon!

Show page: https://apropos-site.vercel.app/episode/54

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I've recently looked into how core.longpaths Git options works and how it's related to Enable Win32 long paths Windows option. Turns out they are not related, and longpaths is both clever and hacky.

Many Windows wide char APIs support longer than MAX_PATH paths through the file namespace prefix (\\?\ or \\?\UNC\) followed by an absolute path. When long paths support is enabled via 'core.longpaths' option, handle_long_path function expands long paths using the '\?' file namespace prefix. See this commit message for detailed explantion.

Brother HL-L2321D as a network-enabled AirPrint printer

Brother HL-L2321D does one thing and does it well. It's fast, prints duplex, and is lean on cartridge usage. Its drivers are available for MacOS and Windows 10, and so installing it is a breeze. Despite the fact that it has one USB port for interface, making this printer accessible (a) over network and (b) on iOS devices is easy too. This requires setting up a print server. Here's why: The key difference between a non-network and a network printer is that the latter not only features hardware (viz., a network port and / or a wireless chip) but that it also has a print server built-in to the printer itself. These missing features in a non-network printer can easily be outsourced to, say, a Raspberry Pi, which may in fact make this a more capable printer than an off-the-shelf network printer.

Setting up a print server on Raspberry Pi

Connecting it to a Raspberry Pi on your home network to enable sharing requires a little work, but when done, it mak

	(ns app
	"Full stack, multiplayer todo list app in one file"
	(:require [datascript.core :as d]
	[hyperfiddle.photon :as p]
	[hyperfiddle.photon-dom :as dom]
	[hyperfiddle.photon-ui :as ui])
	#?(:cljs (:require-macros app)))

	(defonce !conn #?(:clj (d/create-conn {}) :cljs nil))

	-- Based off IETF draft, https://datatracker.ietf.org/doc/draft-peabody-dispatch-new-uuid-format/

	create or replace function uuid_generate_v7()
	returns uuid
	as $$
	begin
	-- use random v4 uuid as starting point (which has the same variant we need)
	-- then overlay timestamp
	-- then set version 7 by flipping the 2 and 1 bit in the version 4 string
	return encode(

	package org.komamitsu.foobar;

	import org.graalvm.nativeimage.IsolateThread;
	import org.graalvm.nativeimage.c.function.CEntryPoint;
	import org.graalvm.nativeimage.c.type.CCharPointer;
	import org.graalvm.nativeimage.c.type.CTypeConversion;

	public class SharedStringMethod
	{
	@CEntryPoint(name = "add")

	# syntax = docker/dockerfile:1.0-experimental

	FROM python:3.7-alpine AS builder

	WORKDIR /app
	COPY . .

	# mount the secret in the correct location, then run pip install
	RUN --mount=type=secret,id=pipconfig,dst=/etc/pip.conf \
	pip install -r requirements.txt

	CREATE OR REPLACE FUNCTION generate_sequential_uuid(p_interval_length int DEFAULT 60)
	RETURNS uuid
	LANGUAGE plpgsql
	AS $$
	DECLARE
	v_i int;
	v_time bigint;
	v_bytes int[16] = '{}';
	v_hex text[16] = '{}';
	BEGIN