Dispatch async

DispatchQueue.global(qos: .background).async {
    // Background Thread
    DispatchQueue.main.async {
        // Run UI Updates or call completion block
    }
}

Main and Background Queues

let main = DispatchQueue.main
let background = DispatchQueue.global()
let helper = DispatchQueue(label: "another_thread")
Working with async and sync threads!

background.async { //async tasks here }
background.sync { //sync tasks here }

Tags: 
iOS

NSAttributedString

One liner swift 4:

label.attributedText = NSAttributedString(string: "Text", attributes:
    [.underlineStyle: NSUnderlineStyle.styleSingle.rawValue])

Tags: 
iOS

Wifi qr code format

Wi-Fi QR Code Format

WIFI:T:WPA;S:mynetwork;P:mypasscode;;

    WPA—the authentication type
    mynetwork — the network SSID
    mypasscode — the password
    ⚠️ Hidden SSIDs are not supported.

Tags: 
iot

Remove Android Studio

rm -Rf /Applications/Android\ Studio.app
rm -Rf ~/Library/Preferences/AndroidStudio*
rm -Rf ~/Library/Preferences/com.google.android.*
rm -Rf ~/Library/Preferences/com.android.*
rm -Rf ~/Library/Application\ Support/AndroidStudio*
rm -Rf ~/Library/Logs/AndroidStudio*
rm -Rf ~/Library/Caches/AndroidStudio*
rm -Rf ~/.AndroidStudio*
rm -Rf ~/.gradle
rm -Rf ~/.android
rm -Rf ~/Library/Android*

Tags: 
Android Java

Device Enrollment notification

move

/System/Library/LaunchAgents/com.apple.ManagedClientAgent.enrollagent.plist
/System/Library/LaunchDaemons/com.apple.ManagedClient.enroll.plist

to
/Library/LaunchAgentsDisabled and /Library/LaunchDaemonsDisabled

Tags: 
OSX

Objects Without xml

in activity

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_main);


        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        float height = displayMetrics.heightPixels;
        float width = displayMetrics.widthPixels;

        RelativeLayout myLayout = new RelativeLayout(this);
        myLayout.setBackgroundColor(Color.BLUE);

        Button myButton = new Button(this);
        myButton.setText("Press me");
        myButton.setBackgroundColor(Color.YELLOW);
        float w = (width*(float)0.3);
        myButton.setLayoutParams(new RelativeLayout.LayoutParams((int)w, (int)w));
        myButton.setX(width*(float)0.1);
        myButton.setY(width*(float)0.1);

        myLayout.addView(myButton);
        setContentView(myLayout);
    }

Tags: 
Android Java

Docker.qcow2 never shrinks

~/Library/Containers/com.docker.docker/

rm Docker.qcow2

Tags: 
docker

price in SKProduct in local currency

func priceStringForProduct(item: SKProduct) -> String? {
        let price = item.price
        if price == 0 {
            return "Free!" //todo: Translate
        } else {
            let numberFormatter = NumberFormatter()
            let locale = item.priceLocale
            numberFormatter.numberStyle = .currency
            numberFormatter.locale = locale
            return numberFormatter.string(from: price)
        }
    }

Tags: 
iOS swift

emitter explosion

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
         createParticles()
    }

    func createParticles() {
        let v = UIView(frame: CGRect(x: 180, y: 220, width: 60, height: 60))
        //v.backgroundColor = .lightGray
        view.addSubview(v)
        let particleEmitter = CAEmitterLayer()
       
        particleEmitter.emitterPosition = CGPoint(x: 30, y: 30)
        particleEmitter.emitterShape = kCAEmitterLayerSphere
        particleEmitter.emitterSize = CGSize(width: 1, height: 1)
       
        let red = makeEmitterCell(color: UIColor.red)
        let green = makeEmitterCell(color: UIColor.green)
        let blue = makeEmitterCell(color: UIColor.blue)
       
        particleEmitter.emitterCells = [red, green, blue]
       
        v.layer.addSublayer(particleEmitter)
        UIView.animate(withDuration: 2.0, animations: {
            v.alpha = 0
        }) { (_) in
            v.layer.sublayers?.removeAll()
        }
    }
   
    func makeEmitterCell(color: UIColor) -> CAEmitterCell {
        let cell = CAEmitterCell()
        cell.birthRate = 2.5
        cell.lifetime = 1.9
        cell.lifetimeRange = 1
        cell.color = color.cgColor
        cell.velocity = 158
        cell.velocityRange = 45
        cell.emissionLongitude = CGFloat.pi
        cell.emissionRange = CGFloat.pi
        cell.spin = 4
        cell.spinRange = 6
        cell.scaleRange = 0.04
        cell.scaleSpeed = 0.3
        cell.xAcceleration = -0.03
        cell.yAcceleration = -0.05
        cell.zAcceleration = 0.2
       
        cell.contents = UIImage(named: "cp")?.cgImage
        return cell
    }
}

Tags: 
iOS swift

version build

if let version = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString"),
            let build = Bundle.main.object(forInfoDictionaryKey: kCFBundleVersionKey as String)
{
     versionLabel.text = "v\(version).\(build)"
}

Tags: 
iOS swift

String contains substring

extension String {
    func contains(find: String) -> Bool{
        return self.range(of: find) != nil
    }
    func containsIgnoringCase(find: String) -> Bool{
        return self.range(of: find, options: .caseInsensitive) != nil
    }
}

Tags: 
iOS swift

Image from UIView

func imageWithView(inView: UIView) -> UIImage? {
    UIGraphicsBeginImageContextWithOptions(inView.bounds.size, inView.isOpaque, 0.0)
    defer { UIGraphicsEndImageContext() }
    if let context = UIGraphicsGetCurrentContext() {
        inView.layer.render(in: context)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        return image
    }
    return nil
}

Tags: 
iOS swift

iPhone x uiviewcontroller

class BaseVC: UIViewController
{
   var shouldHideHomeIndicator     = false
   public let stage                = UIView()

   override func viewDidLoad() {
       super.viewDidLoad()
       HLog.info(function:#function, message: "BaseVC")

       navigationController?.setToolbarHidden(true, animated: false)
       navigationController?.navigationBar.isHidden = true

       setupLayout()
   }


   override func viewDidAppear(_ animated: Bool) {
       super.viewDidAppear(animated)

       self.shouldHideHomeIndicator = true
       if #available(iOS 11.0, *) {
           self.setNeedsUpdateOfHomeIndicatorAutoHidden()
       } else {
           // Fallback on earlier versions
       }
   }

   override var prefersStatusBarHidden: Bool
   {
       return true
   }

   override func preferredScreenEdgesDeferringSystemGestures() ->
UIRectEdge {
       return .top
   }

   override func prefersHomeIndicatorAutoHidden() -> Bool
   {
       return shouldHideHomeIndicator
   }
   //MARK: - Layout
   func setupLayout()
   {
       createStage()
   }

   func createStage()
   {

       let ninesixteen = (sw/9.0*16.0).rounded()
       if ninesixteen <= sh
       {
           stage.frame = Frame(x: 0, y: 0, width: sw, height: ninesixteen)
       }
       else
       {
           stage.frame = Frame(x: 0, y: 0, width: sh/16.0*9.0, height: sh)
       }
       stage.backgroundColor = .clear
       stage.center = view.center
       view.addSubview(stage)
   }

   //MARK: - Helper
   func goto(vc:UIViewController)
   {
       AudioPlayerHelper.play(audioButtonClick)
       UIApplication.shared.keyWindow?.rootViewController = vc.self
   }
}

Tags: 
iOS swift

array with functions

class Bla
{
   let arrayOfFunctions = [function1, function2]

   func function1()
   {
      print("function1")
   }

    func function2() {
        print("function2")
    }

   func useTheFuncs()
   {
    let fn1 = arrayOfFunctions[0]
    fn1(self)()
   }
}

Tags: 
iOS swift

CABasicAnimation

grow shrink, heartbeat?

let img = UIImage(named: "red_star_2")
let imgv = UIImageView(image: img)
let theAnimation = CABasicAnimation()
theAnimation.keyPath = "transform.scale"
theAnimation.duration = 0.7
theAnimation.repeatCount = .infinity
theAnimation.autoreverses = true
theAnimation.fromValue = 1.0
theAnimation.toValue = 1.3
theAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
imgv.layer.add(theAnimation, forKey: "animateOpacity")
imgv.center = CGPoint(x: 50, y: 50)
view.addSubview(imgv)

rotation
let kRotationAnimationKey = "com.myapplication.rotationanimationkey"

let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation")
        rotationAnimation.fromValue = 0.0
        rotationAnimation.toValue = Float(M_PI * 2.0)
        rotationAnimation.duration = 0.2
        rotationAnimation.repeatCount = Float.infinity
        turningStar.layer.add(rotationAnimation, forKey: kRotationAnimationKey)

with completion
import UIKit
import PlaygroundSupport

let viewFrame = CGRect(x: 0, y: 0, width: 500, height: 500)
let view = UIView(frame: viewFrame)
view.backgroundColor = .white
PlaygroundPage.current.liveView = view

let v = UIView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
v.backgroundColor = .red
view.addSubview(v)

CATransaction.begin()
print("start")
let a = CABasicAnimation(keyPath: "position")
a.fromValue = [100, 100]
a.toValue = [200, 200]
a.duration = 2
CATransaction.setCompletionBlock{ print("ended")
}

v.layer.add(a, forKey: nil)
CATransaction.commit()

Tags: 
iOS swift

Link write review in app store

#available(iOS 10, *)!!!

let appID = "959379869"

if let checkURL = URL(string: "http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?id=\(appID)&pageNumber=0&sortOrdering=2&type=Purple+Software&mt=8") {
    open(url: checkURL)
} else {
    print("invalid url")
}

...

func open(url: URL) {
    if #available(iOS 10, *) {
        UIApplication.shared.open(url, options: [:], completionHandler: { (success) in
            print("Open \(url): \(success)")
        })
    } else if UIApplication.shared.openURL(url) {
            print("Open \(url)")
    }
}

Tags: 
iOS swift

Action order for CAKeyframeAnimation

Swift 3

CATransaction.begin()
CATransaction.setCompletionBlock {
    //Actions to be done after animation
}
//Animation Code
CATransaction.commit()

Tags: 
swift animation

Array copy clone

//Protocal that copyable class should conform
protocol Copying {
    init(original: Self)
}

//Concrete class extension
extension Copying {
    func copy() -> Self {
        return Self.init(original: self)
    }
}

//Array extension for elements conforms the Copying protocol
extension Array where Element: Copying {
    func clone() -> Array {
        var copiedArray = Array<Element>()
        for element in self {
            copiedArray.append(element.copy())
        }
        return copiedArray
    }
}

//Simple Swift class that uses the Copying protocol
final class MyClass: Copying {
    let id: Int
    let name: String
   
    init(id: Int, name: String) {
        self.id = id
        self.name = name
    }
   
    required init(original: MyClass) {
        id = original.id
        name = original.name
    }
}

//Array cloning
let objects = [MyClass]()
//fill objects array with elements
let clonedObjects = objects.clone()

Tags: 
swift

Blurred footprint

extension uiimage

public func modifiedImage(_ draw: (CGContext, CGRect) -> ()) -> UIImage {
       
        // using scale correctly preserves retina images
        UIGraphicsBeginImageContextWithOptions(size, false, scale)
        let context: CGContext! = UIGraphicsGetCurrentContext()
        assert(context != nil)
       
        // correctly rotate image
        context.translateBy(x: 0, y: size.height)
        context.scaleBy(x: 1.0, y: -1.0)
       
        let rect = CGRect(x: 0.0, y: 0.0, width: size.width, height: size.height)
       
        draw(context, rect)
       
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image!
    }
public func tintPictogram(with fillColor: UIColor) -> UIImage {
       
        return modifiedImage { context, rect in
            // draw tint color
            context.setBlendMode(.normal)
            fillColor.setFill()
            context.fill(rect)
           
            // mask by alpha values of original image
            context.setBlendMode(.destinationIn)
            context.setAlpha(0.15)
            context.draw(cgImage!, in: rect)
        }
    }

general:
func blurImage(_ image:UIImage) -> UIImage? {
    let context = CIContext(options: nil)
    let inputImage = CIImage(image: image)
    let originalOrientation = image.imageOrientation
    let originalScale = image.scale
   
    let filter = CIFilter(name: "CIGaussianBlur")
    filter?.setValue(inputImage, forKey: kCIInputImageKey)
    filter?.setValue(3.0, forKey: kCIInputRadiusKey)
    let outputImage = filter?.outputImage
   
    var cgImage:CGImage?
   
    if let asd = outputImage
    {
        cgImage = context.createCGImage(asd, from: (inputImage?.extent)!)
    }
   
    if let cgImageA = cgImage
    {
        return UIImage(cgImage: cgImageA, scale: originalScale, orientation: originalOrientation)
    }
   
    return nil
}

use:
if let image = UIImage(named:name)
            {
                 let tintimg = image.tintPictogram(with: .black)
                if let shadowedimage = blurImage(tintimg){
                //...    shadowImages.append(shadowedimage)
                }
               
            }

Tags: 
iOS swift

notes from new es6

probeer in:
http://jsbin.com/

imports

You got two different types of exports: default (unnamed) and named exports:

default => export default ...;

named => export const someData = ...;

You can import default exports like this:

import someNameOfYourChoice from './path/to/file.js';

Named exports have to be imported by their name:

import { someData } from './path/to/file.js'

snips

const myName = 'hjh';
///console.log(myName);

function printName(name){
  console.log(name);
}
const printName2 = (name,age) =>{
  console.log('2: '+name+' age: '+age);
}
//printName("hhhh");
//printName2("hhhh");

const multiply = (number) =>{
  return number * 2;
}
const multiply2 = number => number * 2;

//printName(multiply(4));
//printName(multiply2(4));

class Person{
 
  constructor(name){
    this.name = name;
  }
 
  call() {
    console.log( 'hi from '+ this.name);
  }
}
const p = new Person('hjc');
p.call();

const numbers = [1,2,3];
//spread
const newNumbers = [...numbers,4];
console.log('newNumbers: '+newNumbers);
const newPerson = {
  ...p,
  age: 26
}
console.log(newPerson)

const filter = (...args) => {
  return args.filter(el => el === 1);
}

console.log('filter : '+filter(1,2,3));

[num1,num2] = numbers;
console.log(num1,num2);

// Arrrays & Class's are copied by reference!

const person3 = {
  name: 'Max'
}

const person4 = person3;
const person5 = {
  ...person3
}
person3.name = 'Manu';

console.log(person4);
console.log(person5);

// array .map function
const doubleNumbers = numbers.map((num)=> {return num*2});
console.log('double numbers '+doubleNumbers);

meer array functions
map() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
find() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
findIndex() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
filter() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
reduce() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
concat() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
slice() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
splice() => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...

react components playground:
https://codepen.io

Tags: 
javascript

React Native notes

Lifecycle
constructor(props) {
super(props);
}
render (){}

componentDidMount() {}
componentDidUpdate() {}
componentWillUnmount() {}

React with typoscript
# Make a new directory
$ mkdir react-typescript

# Change to this directory within the terminal
$ cd react-typescript

# Initialise a new npm project with defaults
$ npm init -y

# Install React dependencies
$ npm install react react-dom

# Make index.html and App.tsx in src folder
$ mkdir src
$ cd src
$ touch index.html
$ touch App.tsx

# Open the directory in your favorite editor
$ code .

then index.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>React + TypeScript</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>

<div id="main"></div>
<script src="./App.tsx"></script>
</body>
</html>

# Install Parcel to our DevDependencies
$ npm i parcel-bundler -D

# Install TypeScript
$ npm i typescript -D

# Install types for React and ReactDOM
$ npm i -D @types/react @types/react-dom

add to pack.json
"scripts": {
"dev": "parcel src/index.html"
},

create Counter.tsx

import * as React from 'react';

export default class Counter extends React.Component {
    state = {
        count: 0
    };

    increment = () => {
        this.setState({
            count: (this.state.count += 1)
        });
    };

    decrement = () => {
        this.setState({
            count: (this.state.count -= 1)
        });
    };

    render () {
        return (
            <div>
                <h1>{this.state.count}</h1>
                <button onClick={this.increment}>Increment</button>
                <button onClick={this.decrement}>Decrement</button>
            </div>
        );
    }
}

app.tsx

import * as React from 'react';
import { render } from 'react-dom';

import Counter from './Components/Counter';

render(<Counter />, document.getElementById('main'));

run:
$ npm run dev

Tags: 
javascript
react

shake animations

func shakeByRotateView(view:UIView){
    let shake:CABasicAnimation = CABasicAnimation(keyPath: "transform.rotation")
    shake.duration = 0.12
    shake.repeatCount = Float.infinity
    shake.autoreverses = true
   
    shake.fromValue = NSNumber(value: 0.05*Double.pi)
    shake.toValue = NSNumber(value: -0.05*Double.pi)
    view.layer.add(shake, forKey: "lineRotation")
}

func shakeView(view:UIView){
    let shake:CABasicAnimation = CABasicAnimation(keyPath: "position")
    shake.duration = 0.1
    shake.repeatCount = 2
    shake.autoreverses = true
   
    var from_point:CGPoint = CGPoint(x:view.center.x - 5,y: view.center.y)
    var from_value:NSValue = NSValue(cgPoint: from_point)
   
    var to_point:CGPoint = CGPoint(x:view.center.x + 5,y: view.center.y)
    var to_value:NSValue = NSValue(cgPoint: to_point)
   
    shake.fromValue = from_value
    shake.toValue = to_value
    view.layer.add(shake, forKey: "position")
}

Tags: 
swift

Python rest_framework Docker setup

Dockerfile

FROM python:3

ENV PYTHONUNBUFFERED = 1
RUN mkdir /code
WORKDIR /code
COPY . /code/
RUN pip install -r requirements.txt

docker-compose.yml

version: '3'

services:
  web:
    build: .
    command: python src/profiles_project/manage.py runserver 0.0.0.0:8000
    volumes:
      - .:/code
    ports:
      - "8000:8000"

docker-compose run web python src/profiles_project/manage.py migrate

docker-compose up

Tags: 
Python rest Docker

Codable Decodable

enum PlanetState:String, CodingKey {
    case UnLocked = "unlocked"
    case Locked = "locked"
    case Completed = "completed"
    case Tutorial = "tutorial"
    case ComingSoon = "comingsoon"
}


class Planet: Codable
{
    var state:PlanetState
    var order:Int
    var planetBrev:String
    var bought:Bool
    var collectableGold:Int
   
    enum CodingKeys: String, CodingKey
    {
        case state      = "state"
        case order      = "order"
        case planetBrev = "planetBrev"
        case bought     = "bought"
        case collectableGold = "collectableGold"
    }
   
    init(state: PlanetState, order: Int, planetBrev:String, bought: Bool, collectableGold:Int = -1)
    {
        self.state = state
        self.order = order
        self.planetBrev = planetBrev
        self.bought = bought
        self.collectableGold = collectableGold
    }
   
    required init(from decoder: Decoder) throws {
       
        let values = try decoder.container(keyedBy: CodingKeys.self)
        self.state = (try PlanetState(rawValue: values.decode(String.self, forKey: CodingKeys.state)))!
        self.order = try values.decode(Int.self, forKey: CodingKeys.order)
        self.planetBrev = try values.decode(String.self, forKey: CodingKeys.planetBrev)
        self.bought = try values.decode(Bool.self, forKey: CodingKeys.bought)
        self.collectableGold = try values.decode(Int.self, forKey: CodingKeys.collectableGold)
    }
   
    public func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: CodingKeys.self)
        try? container.encode(self.state.stringValue, forKey: CodingKeys.state)
        try? container.encode(self.order, forKey: CodingKeys.order)
        try? container.encode(self.planetBrev, forKey: CodingKeys.planetBrev)
        try? container.encode(self.bought, forKey: CodingKeys.bought)
        try? container.encode(self.collectableGold, forKey: CodingKeys.collectableGold)
    }
}

load
do {
   let planet = try decoder.decode(Planet.self, from: pData)
   HLog.info(function: #function, message: "planet \(planet.planetBrev) \(planet.collectableGold)")
   self.planets.append(planet)
} catch {
    print("error \(error)")
}

save to default for example
if let jsonData = try? encoder.encode(planet)
            {
                defaults.set(jsonData, forKey: "\(Constants.kQuarkPlanetSave)\(planet.planetBrev)")
                HLog.info(function: #function, message: "defaults did save data \(planet.planetBrev)")
                savedPlanets.append(planet.planetBrev)
            }

class Excercise: Encodable,Decodable {
    var date:Date
    var remarks:[String]
   
    init(date:Date,remarks:[String]) {
        self.date = date
        self.remarks = remarks
    }
 
}

let x = Excercise(date:Date(),remarks:["avc","def"])
let encoder = JSONEncoder()
let jsonData = try encoder.encode(x)
String(data: jsonData, encoding: .utf8)!//"{"date":531262938.28764498,"remarks":["avc","def"]}"
let decoder = JSONDecoder()
let decoded = try decoder.decode(Excercise.self, from: jsonData)
decoded.date//"Nov 1, 2017 at 10:01 PM"
decoded.remarks//["avc", "def"]
type(of: decoded)//Excercise.Type

Tags: 
swift

UILabel outlined / stroked text

class StrokedLabel: UILabel {
   
    var strockedText: String = "" {
        willSet(newValue) {
            let strokeTextAttributes = [
                NSAttributedStringKey(rawValue: NSAttributedStringKey.strokeColor.rawValue) : UIColor.black,
                NSAttributedStringKey(rawValue: NSAttributedStringKey.foregroundColor.rawValue) : UIColor.white,
                NSAttributedStringKey(rawValue: NSAttributedStringKey.strokeWidth.rawValue) : -4.0,
                NSAttributedStringKey(rawValue: NSAttributedStringKey.font.rawValue) : UIFont.boldSystemFont(ofSize: 30)
                ] as [NSAttributedStringKey : Any]?
           
            let customizedText = NSAttributedString(string: newValue
                , attributes: strokeTextAttributes)
           
           
           
            attributedText = customizedText
        }
    }
}

Tags: 
swift

raspi config ssh problem

ssh pi@192.168.1.27
Connection reset by 192.168.1.27 port 22
solution:

sudo rm /etc/ssh/ssh_host_* && sudo dpkg-reconfigure openssh-server

Tags: 
raspberry pi bash python

Path Finding

import GameplayKit

let graph = GKGraph()


let nodeA = GKGraphNode()
let nodeB = GKGraphNode()
let nodeC = GKGraphNode()
let nodeD = GKGraphNode()
let nodeE = GKGraphNode()


graph.addNodes([nodeA,nodeB,nodeC,nodeD,nodeE])
nodeA.addConnectionsToNodes([nodeB,nodeD], bidirectional: true)
nodeB.addConnectionsToNodes( [nodeD], bidirectional: true)
nodeC.addConnectionsToNodes( [nodeE], bidirectional: false)
nodeD.addConnectionsToNodes( [nodeC], bidirectional: false)
let path:[GKGraphNode] = graph.findPathFromNode(nodeA, toNode: nodeE)

Tags: 
swift

Server side Swift

Kitura

mkdir serverside
cd serverside/
mkdir server
cd server
docker run -itv $(pwd):/projects --name projects -w /projects -p 8089:8089 -p 8090:8090 -p 5984:5984 twostraws/server-side-swift /bin/bash
docker start projects
docker attach projects
root@c661e0faa890:/projects# mkdir project1
root@c661e0faa890:/projects# cd project1/
root@c661e0faa890:/projects/project1# swift package init --type executable
root@c661e0faa890:/projects/project1# swift build
root@c661e0faa890:/projects/project1# .build/debug/project1
Hello, world!

change package to:
let package = Package(
name: "project1",
dependencies: [
.Package(url: "https://github.com/IBM-Swift/Kitura.git", majorVersion: 1),
.Package(url: "https://github.com/IBM-Swift/HeliumLogger.git", majorVersion: 1),
.Package(url: "https://github.com/IBM-Swift/Kitura-StencilTemplateEngine.git", majorVersion: 1)
]
)

swift build
swift package generate-xcodeproj

docker ps - shows a list of running containers
docker ps -a shows list all projects

docker start #NAME PROJ#
docker attach #NAME#
ctrl-p ctrl-q to get back to local terminal without stopping
docker start -i #NAME#

Vapor

Use & adjust Post template.
change in fluent.json
"driver":"memory" into "driver":"sqlite"

create
sqlite.json
insert
{
"path":"pokemonDB.sqlite"
}

in config+Setup
change setupPreparations into desired Pokemon class

private func setupPreparations() throws {
        preparations.append(Post.self)
        preparations.append(Pokemon.self)
    }

in router
get("version"){
            request in
            let result = try Pokemon.database?.driver.raw("select sqlite_version();")
            return try JSON(node: result)
        }

MySql

start mysql server
docker run -p 3306:3306 --name some-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d mysql:latest

Tags: 
swift

bitbucket push origin problem

With Bitbucket problem on the raspi :

git push -u origin master

Counting objects: 87, done. error: pack-objects died of signal 9 fatal: The remote end hung up unexpectedly fatal: The remote end hung up unexpectedly ../html# fatal: write error: Bad file descriptor

git config pack.windowMemory 10m
git config pack.packSizeLimit 20m

Failed to push

in git: error: failed to push some refs to

  1. Insufficient permissions: You may not have the necessary permissions to push to the remote repository. Make sure you have the appropriate access rights and try again. Contact the repository owner or administrator if needed.
  2. Network or connectivity issues: There might be network problems or connectivity issues preventing the push operation. Check your internet connection and try again. If the problem persists, it could be a temporary issue with the remote server or the network infrastructure.
  3. Outdated local branch: If the remote repository has been updated since your last pull or clone, you might need to fetch and merge the changes before pushing your local changes. Use the git pull command to update your local branch and resolve any conflicts if necessary. Then attempt the push again.
  4. Remote repository changes: It's possible that someone else has made changes to the remote repository, which conflict with your local changes. In this case, you need to pull the latest changes, resolve any conflicts, and then push your changes.
  5. Git configuration issues: Verify your Git configuration settings, including your username and email address, to ensure they are correctly set up. Use the following commands to check and update if necessary:
git config --global user.name "Your Name"
git config --global user.email "your.email@example.com"
  1. Repository or branch restrictions: The remote repository may have certain restrictions in place, such as branch protection rules or branch permissions. Make sure you are following the guidelines and restrictions set by the repository.
Tags: 
terminal git remote cli bash

combine adding CGRects in array

Adding two CGRect:

let area0 = CGRectZero //{x 0 y 0 w 0 h 0}
let area1 = CGRect(x:0,y:0,width: 2.0, height: 2.0)//{x 0 y 0 w 2 h 2}
let area2 = CGRect(x:2.0,y:2.0,width: 2.0, height: 2.0)
let area3 = CGRect(x:4.0,y:4.0,width: 2.0, height: 2.0)
let union = CGRectUnion(area1, area2)//{x 0 y 0 w 4 h 4}

in an array
var areatotal:[CGRect] = []
areatotal.append(area1)
areatotal.append(area2)
areatotal.append(area3)
areatotal.append(area0)
areatotal.reduce(CGRectZero, combine: CGRectUnion)//{x 0 y 0 w 6 h 6}

Tags: 
swift

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