casperzandbergenyaacomm

protocol EmptyOrNil {
    var isEmpty: Bool { get }
}

extension Optional where Wrapped: EmptyOrNil {
    var isEmptyOrNil: Bool {
        return self?.isEmpty ?? true
    }
}

khanlou

import Foundation
import UIKit

public protocol Configure {}

extension Configure {
    
    /// Makes it available to set properties with closures just after initializing.
    ///
    ///     let frame = UIView().configure {

danlozano

class Coordinator {

    private(set) var childCoordinators: [Coordinator] = []

    func start() {
        preconditionFailure("This method needs to be overriden by concrete subclass.")
    }

    func finish() {
        preconditionFailure("This method needs to be overriden by concrete subclass.")

brygrill

// sample graphql server deployed with firebase functions
// pulling some basic stockmarket data from a firebase db
const functions = require('firebase-functions');
const admin = require('firebase-admin');
const express = require('express');
const graphqlHTTP = require('express-graphql');
const values = require('lodash.values');
const { GraphQLSchema, GraphQLObjectType, GraphQLList, GraphQLString } = require('graphql');

// Init express

simme

/**
 A default implmentation that provides a few convenience methods for starting and stopping coordinators.
 */
extension Coordinator {

    // Default implementation, so that we don't have to do this for all coordinators.
    func startChild<T: NSObject where T: Coordinator>(coordinator coordinator: T, withIdentifier identifier: String, callback: CoordinatorCallback?) -> T {
        childCoordinators[identifier] = coordinator
        coordinator.start(withCallback: callback)
        return coordinator