Vadim Kotov vkotovv

Typing vagrant from the command line will display a list of all available commands.

Be sure that you are in the same directory as the Vagrantfile when running these commands!

Creating a VM

vagrant init -- Initialize Vagrant with a Vagrantfile and ./.vagrant directory, using no specified base image. Before you can do vagrant up, you'll need to specify a base image in the Vagrantfile.
vagrant init <boxpath> -- Initialize Vagrant with a specific box. To find a box, go to the public Vagrant box catalog. When you find one you like, just replace it's name with boxpath. For example, vagrant init ubuntu/trusty64.

Starting a VM

vagrant up -- starts vagrant environment (also provisions only on the FIRST vagrant up)

Install meld
Add location of meld.exe to the PATH, e.g. C:\Program Files (x86)\Meld
In SourceTree, go to Tools/Options/Diff
In External Diff Tool, choose Custom
Enter meld in Diff Command and $LOCAL $REMOTE in Arguments
Click Ok and restart SourceTree

Writing Resilient Reactive Applications

This guide is a first draft (that will end up in the official docs) on writing resilient code for production with the Couchbase Java SDK. At the end, the reader will be able to write code that withstands bugs, latency issues or anything else that can make their application fail.

Note that lots of concepts can be applied for both synchronous and asynchronous access. When necessary, both patterns are discussed separately. Also, the focus is on database interaction, but if you are using RxJava as part of your stack you can apply most of the principles there as well (and should!).

RxJava 101 Recap: Cold and Hot Observables

When working with Observables, it is important to understand the difference between cold and hot. Cold Observables will start to emit events once a Observer subscribes, and will do it "fresh" for each Observer. Hot Observables instead are starting to emit data as soon as it becomes available, and will return the same (or parts of the same)

Setting up Kallithea on Ubuntu Server 12.04

Preparation

Install Ubuntu Server.
Update Ubuntu with the commands:

We have used the most recent beagleboard debian eMMC flasher image to flash the beagle bone black eMMC. As of this writing: wget http://debian.beagleboard.org/images/BBB-eMMC-flasher-debian-7.5-2014-05-14-2gb.img.xz After flashing is complete, erase the sd card, then reboot. Once booted, We can use fdisk -l to list our available devices, I found mine by checking the size and the partition table. After verfifying the card's address, we can reformat it to fit our needs. Of course, this can be done before plugging the card in, as well.

debian@beaglebone:~$ fdisk -l
Disk /dev/mmcblk0: 15.9 GB, 15931539456 bytes 
        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1            8192    31116287    15554048    b  W95 FAT32

	# habraproxy.py — это простейший http-прокси-сервер, запускаемый локально (порт на ваше
	# усмотрение), который показывает содержимое страниц Хабра. С одним исключением: после
	# каждого слова из шести букв должен стоять значок «™». Примерно так:
	#
	# http://habrahabr.ru/company/yandex/blog/258673/
	# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	# Сейчас на фоне уязвимости Logjam все в индустрии в очередной раз обсуждают проблемы и
	# особенности TLS. Я хочу воспользоваться этой возможностью, чтобы поговорить об одной из
	# них, а именно — о настройке ciphersiutes.
	#

	# post_loc.txt contains the json you want to post
	# -p means to POST it
	# -H adds an Auth header (could be Basic or Token)
	# -T sets the Content-Type
	# -c is concurrent clients
	# -n is the number of requests to run in the test

	ab -p post_loc.txt -T application/json -H 'Authorization: Token abcd1234' -c 10 -n 2000 http://example.com/api/v1/locations/

	import android.content.Context;
	import android.content.res.TypedArray;
	import android.graphics.Canvas;
	import android.graphics.drawable.Drawable;
	import android.util.AttributeSet;
	import android.widget.ImageView;

	public class ForegroundImageView extends ImageView {
	private Drawable foreground;

	package com.jpardogo.android.myapplication.app;

	import android.app.ListActivity;
	import android.support.v4.widget.AutoScrollHelper;
	import android.support.v4.widget.ListViewAutoScrollHelper;
	import android.support.v7.app.ActionBarActivity;
	import android.os.Bundle;
	import android.view.Menu;
	import android.view.MenuItem;
	import android.view.MotionEvent;

	# Assuming an Ubuntu Docker image
	$ docker run -it <image> /bin/bash