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Vagrant Setup

This tutorial guides you through creating your first Vagrant project.

We start with a generic Ubuntu VM, and use the Chef provisioning tool to:

• install packages for vim, git
• create user accounts, as specified in included JSON config files
• install specified user dotfiles (.bashrc, .vimrc, etc) from a git repository

Afterwards, we'll see how easy it is to package our newly provisioned VM

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      def unit_price(item)
        if item.order.is_a?(Orders::DsrOrder) && item.eligible_for_dsr_discount?
          item.stylist_price
        else
          item.price
        end
      end

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#
# Shared definition of ruby microservice
#
microservice:
  command: "runsvdir /etc/service"
  environment:
    PORT: 3000
    RAILS_ENV: development
    SERVICE_PLATFORM: "mia"
  ports:

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Recording a Great Coding Screencast

The Screen

First and foremost a coding screencast is about the code, and we need to make sure it looks great. There are a few aspects to this that help ensure that is the case.

Resolution

720p is the target resolution. In pixel terms this is 1280x720. We've gotten the best results when we record at 2560x1440 in a HiDPI (pixel double) mode, giving an effective visible resolution of 1280x720, but extremely crisp. This resolution is achievable on 27" monitors and retina MBPs.

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Elegant and beautifully implemented Ember 2.x applications.

Each app and repo is a perfect example to poke around when learning Ember 2.x framework

Hummingbird.me

Ember 2.x, Ember Data github repo (same repo for both frontend and backend)

• OAuth2
• JSONAPIAdapter

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:) CREATE TABLE test.nested (EventDate Date, UserID UInt64, Attrs Nested(Key String, Value String)) ENGINE = MergeTree(EventDate, UserID, 8192)

CREATE TABLE test.nested
(
    EventDate Date, 
    UserID UInt64, 
    Attrs Nested(
    Key String, 
    Value String)
) ENGINE = MergeTree(EventDate, UserID, 8192)

akurkin

$ clickhouse-client 
ClickHouse client version 0.0.53720.
Connecting to localhost:9000.
Connected to ClickHouse server version 1.1.53981.

:) CREATE TABLE test.funnel (userID UInt64, eventType Enum8('A' = 1, 'B' = 2), EventTime Date, Age UInt8) ENGINE = Memory

CREATE TABLE test.funnel
(
    userID UInt64, 

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:) SELECT toDateTime(intDiv(toUInt32(EventTime), 5) * 5) AS k, count(), uniq(UserID) FROM hits_layer WHERE CounterID = 29761725 AND EventDate = today() AND EventTime >= now() - 600 GROUP BY k ORDER BY k

SELECT 
    toDateTime(intDiv(toUInt32(EventTime), 5) * 5) AS k, 
    count(), 
    uniq(UserID)
FROM hits_layer
WHERE (CounterID = 29761725) AND (EventDate = today()) AND (EventTime >= (now() - 600))
GROUP BY k
ORDER BY k ASC

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:) SELECT toMonday(EventDate) AS k, count(), uniq(UserID) FROM hits_layer WHERE CounterID = 29761725 AND EventDate >= '2016-05-01' GROUP BY k ORDER BY k

SELECT 
    toMonday(EventDate) AS k, 
    count(), 
    uniq(UserID)
FROM hits_layer
WHERE (CounterID = 29761725) AND (EventDate >= '2016-05-01')
GROUP BY k
ORDER BY k ASC

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What

A lot of times you are developing a web application on your own laptop or home computer and would like to demo it to the public. Most of those times you are behind a router/firewall and you don't have a public IP address. Instead of configuring routers (often not possible), this solution gives you a public URL that's reverse tunnelled via ssh to your laptop.

Because of the relaxation of the sshd setup, it's best used on a dedicated virtual machine just for this (an Amazon micro instance for example).

Requirements