Vitaly arvitaly

Install Prerequisites on ALL (Worker and Master) Nodes

Let's remove any old versions of Docker if they exist:

sudo yum remove docker \
                  docker-common \
                  docker-selinux \
                  docker-engine

Working with git remotes on Heroku

Generally, you will add a git remote for your Heroku app during the Heroku app creation process, i.e. heroku create. However, if you are working on an existing app and want to add git remotes to enable manual deploys, the following commands may be useful.

Adding a new remote

Add a remote for your Staging app and deploy

Note that on Heroku, you must always use master as the destination branch on the remote. If you want to deploy a different branch, you can use the syntax local_branch:destination_branch seen below (in this example, we push the local staging branch to the master branch on heroku.

$ git remote add staging https://git.heroku.com/staging-app.git

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

In this gist I would like to describe an idea for GraphQL subscriptions. It was inspired by conversations about subscriptions in the GraphQL slack channel and different GH issues, like #89 and #411.

Conceptual Model

At the moment GraphQL allows 2 types of queries:

query
mutation

Reference implementation also adds the third type: subscription. It does not have any semantics yet, so here I would like to propose one possible semantics interpretation and the reasoning behind it.

	// Related to https://issues.jenkins-ci.org/browse/JENKINS-26481

	abcs = ['a', 'b', 'c']

	node('master') {
	stage('Test 1: loop of echo statements') {
	echo_all(abcs)
	}

	stage('Test 2: loop of sh commands') {

	const fs = require('fs');
	const solc = require('solc');
	const Web3 = require('web3');

	// Connect to local Ethereum node
	const web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));

	// Compile the source code
	const input = fs.readFileSync('Token.sol');
	const output = solc.compile(input.toString(), 1);

	ADOBE Creative Suite 5 Master Collection


	1023-1631-3275-3276-0087-5426

	1325-1576-4130-9475-8280-4266
	1325-1548-7004-9142-5077-1912
	1325-1684-1405-3432-6260-7438
	1325-1238-0019-6636-5160-2146
	1325-1966-4532-5397-9277-9204

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

	function logClass(target: any) {

	// save a reference to the original constructor
	var original = target;

	// a utility function to generate instances of a class
	function construct(constructor, args) {
	var c : any = function () {
	return constructor.apply(this, args);
	}