Dragan Jovanović draganjovanovic1

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.

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

	/// <summary>
	/// See https://developers.google.com/maps/documentation/utilities/polylinealgorithm
	/// </summary>
	public static class GooglePoints
	{
	/// <summary>
	/// Decode google style polyline coordinates.
	/// </summary>
	/// <param name="encodedPoints"></param>
	/// <returns></returns>

	// Intercepting HTTP calls with AngularJS.
	angular.module('MyApp', [])
	.config(function ($provide, $httpProvider) {

	// Intercept http calls.
	$provide.factory('MyHttpInterceptor', function ($q) {
	return {
	// On request success
	request: function (config) {
	// console.log(config); // Contains the data about the request before it is sent.

	<?xml version="1.0" encoding="utf-8"?>
	<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

	<!-- Drop Shadow Stack -->
	<item>
	<shape>
	<padding
	android:bottom="1dp"
	android:left="1dp"
	android:right="1dp"

	[HttpPost]
	public HttpResponseMessage CreateCustomer(string name, string billingInfo)
	{
	Result<BillingInfo> billingInfoResult = BillingInfo.Create(billingInfo);
	Result<CustomerName> customerNameResult = CustomerName.Create(name);

	return Result.Combine(billingInfoResult, customerNameResult)
	.OnSuccess(() => _paymentGateway.ChargeCommission(billingInfoResult.Value))
	.OnSuccess(() => new Customer(customerNameResult.Value))
	.OnSuccess(

	#!/bin/bash
	echo "Building NGINX along with Echo module"

	# install prerequisites
	yum -y install gcc gcc-c++ make zlib-devel pcre-devel openssl-devel

	# download the Echo module
	curl -L -O 'https://github.com/openresty/echo-nginx-module/archive/v0.58.tar.gz'
	tar -xzvf v0.58.tar.gz && rm v0.58.tar.gz
	mv echo-nginx-module-0.58 /tmp/echo-nginx-module

	namespace Fable.Import
	open System
	open Fable.Core
	open Fable.Import.JS

	module EventStore =
	type [<Erase>] Initializer<'state> = unit -> 'state

	type [<Erase>] EventHandler<'state,'event> = System.Func<'state,EventEnvelope<'event>,'state>
	and [<Erase>] EventHandler<'state,'event,'metadata> = System.Func<'state,EventEnvelope<'event,'metadata>,'state>