Chris Coetzee chriscz

Ruby Example: Prefix second argument

[Playground link](https://ast-grep.github.io/playground.html#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

Install, start and enable:

  apt install firewalld
  systemctl start firewalld 
  systemctl enable firewalld

Make sure the file /etc/docker/daemon.json does not contain this line. If it does, delete/comment it. If the file is missing, it is OK, you can skip the step:

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!

Exporting your 2FA tokens from Authy to transfer them into another 2FA application

IMPORTANT - Update regarding deprecation of Authy desktop apps

Past August 2024, Authy stopped supported the desktop version of their apps:
See Authy is shutting down its desktop app | The 2FA app Authy will only be available on Android and iOS starting in August for details.

And indeed, after a while, Authy changed something in their backend which now prevents the old desktop app from logging in. If you are already logged in, then you are in luck, and you can follow the instructions below to export your tokens.

If you are not logged in anymore, but can find a backup of the necessary files, then restore those files, and re-install Authy 2.2.3 following the instructions below, and it should work as expected.

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb

Improved YARD CHEATSHEET http://yardoc.org

forked from https://gist.github.com/chetan/1827484 which is from early 2012 and contains outdated information.

Templates to remind you of the options and formatting for the different types of objects you might want to document using YARD.

	docker run --rm -it -v $PWD:/tmp debian:10-slim /bin/bash
	# --rm : remove after exit
	# -it : interactive TTY
	# -v : mount folder : current folder to /tmp folder of the container
	# debian:10-slim : docker image https://git.io/JJzfy
	# /bin/bash : run bash in this container

	ruby '2.7.1'

	gem 'rails', github: 'rails/rails'
	gem 'tzinfo-data', '>= 1.2016.7' # Don't rely on OSX/Linux timezone data

	# Action Text
	gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra'
	gem 'okra', github: 'basecamp/okra'

	# Drivers

	#!/bin/bash

	echo "Installing deps..."
	sudo apt-get install libssl-dev zlib1g-dev libpam0g-dev xz-utils
	sudo apt-get remove openssh-server

	echo "Downloading and extracting sources..."
	wget http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-7.6p1.tar.gz
	wget http://www.linuxfromscratch.org/patches/downloads/openssh/openssh-7.6p1-openssl-1.1.0-1.patch
	tar -xf openssh-7.6p1.tar.gz

	import fetch from 'node-fetch';
	import { observable, action, runInAction } from 'mobx';

	export default class GithubStore {
	@observable searchName;
	@observable user;
	@observable repos;
	@observable fetchingData;

	constructor() {