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@ngrx/store counter

Basic counter w/ @ngrx/store.

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var page = require('webpage').create(),
    url = 'http://example.com/';

// Put the event handlers somewhere in the code before the action of 
// interest (opening the page in question or clicking something)

// http://phantomjs.org/api/webpage/handler/on-console-message.html
page.onConsoleMessage = function(msg, lineNum, sourceId) {
  console.log('CONSOLE: ' + msg + ' (from line #' + lineNum + ' in "' + sourceId + '")');
};

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Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

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HTTP Streaming (or Chunked vs Store & Forward)

The standard way of understanding the HTTP protocol is via the request reply pattern. Each HTTP transaction consists of a finitely bounded HTTP request and a finitely bounded HTTP response.

However it's also possible for both parts of an HTTP 1.1 transaction to stream their possibly infinitely bounded data. The advantages is that the sender can send data that is beyond the sender's memory limit, and the receiver can act on

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Build Server

• Go to Digital Ocean
• Create new ubuntu droplet

Setup Server

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sudo apt-get update
sudo apt-get install -y libevent-dev libncurses-dev make
wget https://github.com/tmux/tmux/releases/download/2.2/tmux-2.2.tar.gz
tar xvzf tmux-2.2.tar.gz
cd tmux-2.2/
./configure && make
sudo make install

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sudo apt-get update
sudo apt-get install -y libevent-dev libncurses-dev make
wget https://github.com/tmux/tmux/releases/download/2.2/tmux-2.2.tar.gz
tar xvzf tmux-2.2.tar.gz
cd tmux-2.2/
./configure && make
sudo make install

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// # Mocha Guide to Testing
// Objective is to explain describe(), it(), and before()/etc hooks

// 1. `describe()` is merely for grouping, which you can nest as deep
// 2. `it()` is a test case
// 3. `before()`, `beforeEach()`, `after()`, `afterEach()` are hooks to run
// before/after first/each it() or describe().
//
// Which means, `before()` is run before first it()/describe()

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// @flow

import React, { Component } from 'react';
import {
  WebView,
} from 'react-native';

class LoginScreen extends Component {
  state = {
    cookies    : {},

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Elixir installation guide

Version numbers should be the ones you want. Here I do it with the last ones available at the moment of writing.

The simplest way to install elixir is using your package manager. Sadly, at the time of writing only Fedora shows the intention to keep its packages up to date. There you can simply sudo dnf install erlang elixir and you are good to go.

Anyway, if you intend to work with several versions of erlang or elixir at the same time, or you are tied to a specific version, you will need to compile it yourself. Then asdf is your best friend.