mikeynine

[mikeynine]

HP/Aruba 2530-48G-2SFP+ enable 3rd party transceivers

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

allow-unsupported-transceiver

[mikeynine]

Handy little reference for building strftime formatters. 

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Swift Class Structure with Initializer and Default Values

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

This also allows you to be able to instantiate your class without defining all values and not have it blow up on you.  

[mikeynine]

Working with Swift LocationManager

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

if LocationManager.shared.isUpdatingLocation {    print("Is currently updating location.") } else {    print("Location updates have stopped.") }

[mikeynine]

XCode 8.3 / Xcode 9.0 Refresh provisioning profile devices

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.

Taken from: https://stackoverflow.com/questions/44060482/xcode-8-3-xcode-9-0-refresh-provisioning-profile-devices 

[mikeynine]

where I go when I can’t remember the markdowns

[mikeynine]

Simple QR Code Generator

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Previewing your Ruby on Rails mailer locally.

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

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

This will show you the HTML preview of the “new_user” template located in the user_mailer view folder. ENJOY!

[mikeynine]

Find processes that are using a specific port in OSX

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

lsof -wni tcp:<port_number>

[mikeynine]

Recording iOS Simulator to Video in Xcode

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>

Recording begins immediately, and continues until you kill the simctlprocess by pressing ^C.

[mikeynine]

Command to generate new rails project with web pack for react and postgres database

rails new yourProjectName --webpack=react --database=postgresql -T

[mikeynine]

Pretty good, casual overview on react native for iOS.