hapless technoweenie

Telnet into your HP/Aruba 2530 switch that is running the latest firmware (at least 16.02.0016) and under the config menu send the following command

Here’s an example of swift class for a rectangle that has an initializer and optional default values. 

import Foundation

class Rectangle: Codable {

    var name:String

    var length:Int

    var width:Int

    init(name:String = "", length:Int  = 4, width:Int = 2) {

        self.name = name

        self.length = length

        self.width = width

    }

}

This rectangle will have an area of 8 by default: 

r = Rectangle()

print(r.length * r.width) // => 8

but if we define the width to be 4, we will have a square with an area of 16

s = Rectangle(width: 4)

print(s.length * s.width) // => 16

I started out creating location managers on each controller and then I read this. As there should ever only be one instance of the LocationManager, a singleton is definitely the right way to go. 

Swift 3 Singleton

import CoreLocation class LocationManager: CLLocationManager {    var isUpdatingLocation = false    static let shared = LocationManager()    override func startUpdatingLocation() {        super.startUpdatingLocation()        isUpdatingLocation = true    }    override func stopUpdatingLocation() {        super.stopUpdatingLocation()        isUpdatingLocation = false    } }

Usage

Go to ~/Library/MobileDevice/Provisioning\ Profiles/ and delete all the provisioning profiles from there.

Go to XCode > Preferences > Accounts and select the Apple Id.

Click Download All Profiles. And it will download all the provisioning profiles again.

Xcode 9

Step 1 and 2 remain the same.

Click Download Manual Profiles to update your provisioning profiles.

You can preview your rails mailer locally without needing to send it by going to 

http://localhost:3000/rails/mailers/user_mailer/new_user

Use the “List Open Files” command to display the PIDs of any process using a TCP port 

The easiest way to get the device parameter is to launch the simulator manually through Xcode, then use the value  booted:

xcrun simctl io booted recordVideo <path>