eMdOS

import Foundation

public enum APIError: Error {
    case service(message: String)
}

extension APIError: CustomStringConvertible {
    public var description: String {
        switch self {
        case .service(let message):

eMdOS

Perl and PHP Regular Expressions

PHP regexes are based on the PCRE (Perl-Compatible Regular Expressions), so any regexp that works for one should be compatible with the other or any other language that makes use of the PCRE format. Here are some commonly needed regular expressions for both PHP and Perl. Each regex will be in string format and will include delimiters.
All Major Credit Cards

This regular expression will validate all major credit cards: American Express (Amex), Discover, Mastercard, and Visa.

    //All major credit cards regex
    '/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6011[0-9]{12}|622((12[6-9]|1[3-9][0-9])|([2-8][0-9][0-9])|(9(([0-1][0-9])|(2[0-5]))))[0-9]{10}|64[4-9][0-9]{13}|65[0-9]{14}|3(?:0[0-5]|[68][0-9])[0-9]{11}|3[47][0-9]{13})*$/'

eMdOS

public enum Regex: String {
    case email = "^[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}$"
}

extension Regex: RegexProvider {
    public var regex: String {
        return rawValue
    }
    
    static func validate(expression: String, forRegex regex: Regex) -> Bool {

eMdOS

SSH Keys

Generating a new SSH key

1. Create a ssh key:

   ssh-keygen -t rsa -b 4096 -C "<email>"

eMdOS

Playground

Async execution

• At the imports section:

   import PlaygroundSupport

eMdOS

macOS

Change where screenshots save

1. Creating a folder for screenshots (~/Pictures/Screenshots/):

   mkdir ~/Pictures/Screenshots/

eMdOS

@echo off
title Flash Memory 
color 1E
@echo ----------------------------------------------
@echo ------------- Memory Flash Fixer -------------
@echo ----------------------------------------------
@echo Changing Folder Attributes...
Attrib /d /s -r -h -s *.* 
@echo ----------------------------------------------
@echo Deleting Links

eMdOS

//
//  RecordAudio.swift
//
//  This is a Swift 3.0 class
//    that uses the iOS RemoteIO Audio Unit
//    to record audio input samples,
//  (should be instantiated as a singleton object.)
//
//  Created by Ronald Nicholson on 10/21/16.  Updated 2017Feb07
//  Copyright © 2017 HotPaw Productions. All rights reserved.

eMdOS

@available(iOS 5.0, *)
open class UIStoryboard : NSObject {    
    public /*not inherited*/ init(name: String, bundle storyboardBundleOrNil: Bundle?)

    open func instantiateInitialViewController() -> UIViewController?

    open func instantiateViewController(withIdentifier identifier: String) -> UIViewController
}

eMdOS

#!/bin/bash

update="update"
bootstrap="bootstrap"

expectation_message="EXPECTED: [ $update | $bootstrap ]"

if [ $# -eq 0 ]; then
    echo "ERROR: No argument supplied."
    echo $expectation_message