Alex Simonescu alxsimo

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Method 1

Backup the public and secret keyrings and trust database

cp ~/.gnupg/pubring.gpg /path/to/backups/
cp ~/.gnupg/secring.gpg /path/to/backups/
cp ~/.gnupg/trustdb.gpg /path/to/backups/

or, instead of backing up trustdb...

Default

Powerlevel10k

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

##Interfaces for presenters in MVP are a waste of time!

It's been a long time since we started talking about MVP. Today, the discussion is about if creating an interface for the Presenter in MVP is needed.

This is the Model View Presenter pattern's schema:

In this schema the Model box is related to all the code needed to implement your business logic, the presenter is the class implementing the presentation logic and the view is an interface created to abstract the view implementation.

IntelliJ Shortcuts (Mac)

Notes:

Most of this shortcuts are applicable to Android Studio.
Two of the most useful shortcuts utilize the Fn (function) keys. It is therefore recommended that you enable the "Use all F1, F2, etc. keys as standard function keys" option [System Preferences > Keyboard].
Be sure to enable the Mac OS X 10.5+ keymap in Android Studio [Preferences > Keymap].
A fairly complete shortcut list can be found here.

Useful symbols:

Type	Functor	Apply	Applicative	Bind	Monad	MonoidK	MonadError	Cobind	Comonad
Id[A]	✔	✔	✔	✔	✔	✗	✗	✔	✔
Option[A]	✔	✔	✔	✔	✔	✔	✗	✔	✗
Const[K, A]	✔	✔ (`K:Monoid`)	✔	✗	✗	✗	✗	?	?
Either[E, A]	✔	✔	✔	✔	✔	✔	✔	✗	✗
List[A]	✔	✔	✔	✔	✔	✔	✗	✔	✗
NonEmptyList[A]	✔

	[merge]
	keepBackup = false
	tool = p4merge
	[mergetool "p4merge"]
	cmd = /Applications/p4merge.app/Contents/Resources/launchp4merge "\"$PWD/$BASE\"" "\"$PWD/$REMOTE\"" "\"$PWD/$LOCAL\"" "\"$PWD/$MERGED\""
	keepTemporaries = false
	trustExitCode = false
	keepBackup = false
	[diff]
	tool = p4merge

	/*
	* Copyright 2014 Julian Shen
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

	package com.firebase.client;

	import com.firebase.client.core.Constants;
	import rx.Observable;
	import rx.Subscriber;
	import rx.functions.Action0;
	import rx.functions.Func1;
	import rx.subscriptions.Subscriptions;

	public class RxFirebase {


	/**
	* This class allows to inject into objects through a base class,
	* so we don't have to repeat injection code everywhere.
	*
	* The performance drawback is about 0.013 ms per injection on a very slow device,
	* which is negligible in most cases.
	*
	* Example:
	* <pre>{@code