algal

/*

Everyone on Stack Overflow does HTTP Basic Authentication on iOS by manually 
building the HTTP headers.

This amounts to re-implementing HTTP.

Why? The Cocoa Touch URL Loading System aleady knows HTTP, and you can
configure your URLSession to supply HTTP Basic Authentication credentials
like so.

algal

import Foundation

/// Represents side effects needed to sync dst with src
enum Effect {
  /// in dst, remove specified item in dst
  case remove(dstIndex:Int)
  /// in dst, add the specified item from src
  case add(srcIndex:Int)
}

algal

/*
 
 ## background
 
 When you write a function that mutates the var properties of a
 mutable struct, this _creates a new instance_.[1] As a result,
 a variable pointing to a value of this type before the mutation
 will still be pointing to the old value after the mutation, as long
 as you did not use that variable to do the mutation.
 

algal

// known-good: Swift 3
import UIKit

/// for a UIView that can be populated via `configure`
protocol ConfigurableView : class {
  associatedtype Value
  func configure(_ value:Value)
}

/// for a UICollectionViewCell wrapping a UIView

algal

/**
 Generic CollectionViewCell, which can be specialized to wrap a UIView.
 
 To use this, you can simply define a typealias like so:
 
 ```
 class FooView : UIVIew { /* ... */ }
 typealias FooCell = WrappedCollectionViewCell<FooView>
 ```

algal

import UIKit

// known-good: Xcode 8.2.1

/**
 
 UIImageView subclass which works with Auto Layout to try 
 to maintain the same aspect ratio as the image it displays.
 
 This is unlike the usual behavior of UIImageView, where the 

algal

// known-good Xcode 8.2.1
extension URL
{
  /** 
   Returns the data from a URI with the "data:" scheme, which includes the optional "base64" annotation, and which has a mediatype that is encoded in ASCII. As described in https://tools.ietf.org/html/rfc2397.
   */
  var asData:Data?
  {
    guard
      let scheme = self.scheme, scheme == "data",

algal

import Foundation

// machine, version, release, nodename, sysname

extension utsname : CustomStringConvertible {
  static var `default`:utsname {
    var x = utsname()
    uname(&x)
    return x
  }

algal

// known-good: Xcode 8.2.1, Swift 3, 2017-02-08

/**
 Draws a circle, centered in the view, with the specified radius
 */
class CircleView: UIView
{
  // API
  var circleRadius:CGFloat = 15 {
    didSet { self.setNeedsLayout() }

algal

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<!-- iOS 10, macOS Sierra, and friends bring a new logging subsystem that's
supposed to scale from the kernel, up to frameworks, and up to apps. It defaults
to a more regimented, privacy-focused approach that large apps and complex
systems need.

It, along with Activity Tracing introduced in iOS 8 and macOS Yosemite and the
Console app in macOS Sierra, hope to help you graduate from caveman debugging to