sorin-ref

import SceneKit
import PlaygroundSupport

var sceneView = SCNView()
PlaygroundPage.current.liveView = sceneView
sceneView.backgroundColor = .black
var scene = SCNScene()
sceneView.scene = scene
var universe = scene.rootNode

sorin-ref

import numpy as np
np.random.seed(0)

def sigmoid(t):
    return 1 / (1 + np.exp(-t))
def sigmoid_derivative(p):
    return p * (1 - p)

class NeuralNetwork:
    def __init__(self, training_input, known_output, weights=10, training=10000):

sorin-ref

import SceneKit
import PlaygroundSupport

var sceneView = SCNView()
PlaygroundPage.current.liveView = sceneView
var scene = SCNScene()
sceneView.scene = scene

var object = SCNBox(width: 10, height: 10, length: 10, chamferRadius: 1)
var objectMaterial = object.firstMaterial!

sorin-ref

import Foundation
import Combine
import PlaygroundSupport

func await<T>(_ body: @escaping (@escaping (T) -> Void) -> AnyCancellable) -> T {
    return {
        var result: T! = nil
        let semaphore = DispatchSemaphore(value: 0)
        body { value in
            result = value

sorin-ref

let lat = Float.random(in: -70...70), long = Float.random(in: -180..<180)
let query = "api=1&query=\(lat),\(long)"
NSWorkspace.shared.open(URL(string: "https://www.google.com/maps/search/?\(query)")!)

sorin-ref

let query = "api=1&query=51.509865, -0.118092"
    .addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
NSWorkspace.shared.open(URL(string: "https://www.google.com/maps/search/?\(query)")!)

sorin-ref

import Cocoa
NSWorkspace.shared.open(URL(string: "https://www.google.com/maps")!)

sorin-ref

typealias Action = ()->Void

class Service {
    var closure: Action?
    func setClosure(_ closure: @escaping Action) {
        self.closure = closure
    }
    func executeClosure() {
        closure?()
    }

sorin-ref

func run() {
    let service1 = Service("S1")
    let service2 = Service("S2")
    let client1 = Client("C1", subscribingTo: service1)
    let client2 = Client("C2", subscribingTo: service2)
    service1.doSomething(1)
    service2.somethingWasDone.addHandler(client1.somethingWasDoneHandler)
    service2.doSomething(2)
    service2.somethingWasDone.removeHandler(client1.somethingWasDoneHandler)
    service2.doSomething(3)

sorin-ref

class Service {
    init(_ name: String = "default") {
        self.name = name
    }
    var name: String
    func doSomething(_ info: Int) {
        somethingWasDone.raise(info)
    }
    var somethingWasDone = Event<Int>()
    deinit {