Max Justus Spransy maxjustus

Writing a dynamic library in Crystal, and calling it from C

Download all files.
Build the Crystal part:

crystal build --release --cross-compile --prelude ./no_main library.cr
              ^ You can leave this out
                        ^ We want to link ourselves!
 ^ Use our custom prelude!

Faster Rails tests

Feedback loop speed in one of the biggest contributing factors to overall development time. The faster you get results, the faster you can move on to other things. A fast enough test suite is therefore critical to teams' success, and is worth investing some time at the beginning to save in the long run.

Below is a list of techniques for speeding up a Rails test suite. It is not comprehensive, but should definitely provide some quick wins. This list of techniques assumes you're using minitest, but most everything should translate over to rspec by simply replacing test/test_helper.rb with spec/spec_helper.rb.

Lead with data
bcrypt
bootsnap
Cache Time::utc calls

My macos system/dotfile bootstrap process uses brew bundle to install some apps. This takes a while to complete, so I hoped to use an Automator Folder Action workflow to watch the /Applications/ directory and launch a few apps that require logins as soon as brew bundle finishes installing them.

Automator did not do a good job of this (I did 3 test runs and it never opened each of the apps in the trigger list), but I didn't realize that until after I figured out how to actually install and activate the workflow during my bootstrap process. I wanted to go ahead and share the bits of this process in the hope someone else trying to accomplish the same will need a little less work.

58 bytes of CSS to look great nearly everywhere

When making this website, i wanted a simple, reasonable way to make it look good on most displays. Not counting any minimization techniques, the following 58 bytes worked well for me:

main {
  max-width: 38rem;
  padding: 2rem;
  margin: auto;
}

Handy Custom Elements' Patterns

^{Photo by Ricardo Gomez Angel on Unsplash}

This gist is a collection of common patterns I've personally used here and there with Custom Elements.

These patterns are all basic suggestions that could be improved, enriched, readapted, accordingly with your needs.

	package main

	import (
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"

	"golang.org/x/net/webdav"

	#!/bin/bash

	OUTDIR=.

	while read -r db ; do
	while read -r table ; do

	if [ "$db" == "system" ]; then
	echo "skip system db"
	continue 2;

	DROP TABLE IF EXISTS requests;

	CREATE TABLE requests (
	request_date Date,
	request_time DateTime,
	response_time Int,
	request_uri String)
	ENGINE = MergeTree(request_date, (request_time, request_uri), 8192);

	version: '2'
	services:
	api:
	volumes:
	- "nfsmount:${CONTAINER_DIR}"

	volumes:
	nfsmount:
	driver: local
	driver_opts:

	ClickHouse server version 18.14.12 revision 54409.


	create table data(K Int64, V String) engine=MergeTree order by K;
	insert into data select number, toString(number) from numbers(100,100000000);
	optimize table data final;
	create table buffer(K Int64, V String) engine=Memory;
	insert into buffer select number, toString(number) from numbers(0,1000);