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links for old versions of Docker for Mac

Deprecated

Docker provides download links in release note. They promised that

(we) will also include download links in release notes for future releases.

Note:

3 ways to build a GitHub Action with Dart

In 2020, I published the Pub package github_actions_toolkit to write GitHub Actions with Dart more easily. However, GitHub Actions runners don't support natively the Dart language, and some steps are necessary to execute a Dart program in a GitHub Actions workflow.

Below I compare three ways to create a GitHub Action with Dart, with their pros and cons.

.	Shared Dart container	Isolated Dart container	Natively compiled executable
✍️ Defines the environment	User	Developer	Developer

Source

Postfix, Dovecot, MySQL – Ex Ratione

This long post contains a recipe for building a reasonably secure Ubuntu 16.04 mail server in Amazon Web Services, using Postfix, Dovecot, and MySQL, with anti-spam packages in the form of amavisd-new, Clam AntiVirus, SpamAssassin, and Postgrey. Local users [are virtual][1] rather than being system users. Administration of users and domains is achieved through the Postfix Admin web interface. Webmail is provided by Roundcube.

This is an updated version of earlier [Ubuntu 12.04][2] and [Ubuntu 14.04][3] mailserver recipes. A number of people graciously helped to fix bugs and make improvements in the original, so should you find a blocking issue here please do let me know.

Introduction

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

Create the file with the environment variables:

$ cat envs.txt
HOSTNAME=app.domain.com
PASSWORD=foobar

Create the config map:

	"""As part of the 'Data Structures and Introduction to Algorithms' course, I was asked to solve the following problem:
	Write a function that sorts five elements in seven comparisons in the worst case.

	As I found this problem interesting, I decided to implement it in Python. For better understanding, I recommend
	reading the answer from the link below, which explains the algorithm.
	"""

	import random
	from typing import List

	name: Security audit
	on:
	schedule:
	- cron: '0 0 * * *'
	push:
	paths:
	- '**/Cargo.toml'
	- '**/Cargo.lock'
	jobs:
	security_audit:

	#! /bin/bash

	for blog_path in $(wp site list --field=path)
	do
	path_wo_slashes="${blog_path////""}"
	url="http://your.blog.address/$path_wo_slashes"
	# status = approve, hold, trash, spam
	tmp_ids=$(wp comment list --status=hold --format=ids --url=$url)
	# clean the string
	pending_ids="$(echo -e "${tmp_ids}" \| sed -e 's/^[[:space:]]//' -e 's/[[:space:]]$//')"

	// Bookmarklet
	javascript: var % 20b = document.body;
	var % 20POSTEROUS___bookmarklet_domain = 'http://posterous.com';
	var % 20d = new % 20Date();
	var % 20e = (new % 20Date(d.getFullYear(), d.getMonth(), d.getDate())).getTime();
	if (b && !document.xmlVersion) {
	void(z = document.createElement('script'));
	void(z.type = 'text/javascript');
	void(z.src = 'http://posterous.com/javascripts/bookmarklet2.js?' + e);
	void(b.appendChild(z));

	/jshint newcap:false /
	/global alert, setTimeout/
	var CJ_PUBLISHER_BOOKMARKLET = (function () {
	var baseClass = 'cj-account-manager',
	animate = function (options) {
	var start = new Date(),
	intervalId,
	duration = options.duration \|\| 400;

	intervalId = setInterval(function() {