JoshuaSullivan

protocol AnalyticsBackEnd {
    static func log(_ name: String)
}

extension Analytics: AnalyticsBackEnd {}

JoshuaSullivan

Core Image Filters

iOS 12.2 has 207 filters.

Accordion Fold Transition (CIAccordionFoldTransition)

First available: iOS 8

Transitions from one image to another of a differing dimensions by unfolding.

JoshuaSullivan

Core Image Filters

iOS 13 has 218 filters.

New Filters in iOS 13

• CIDocumentEnhancer
• CIGaborGradients
• CIKeystoneCorrectionCombined
• CIKeystoneCorrectionHorizontal
• CIKeystoneCorrectionVertical

JoshuaSullivan

import UIKit
import Combine

/// This class wraps a `CADisplayLink` and exposes its callback as a Combine Publisher.
///
class CombineDisplayLink {

    /// An object that includes timing information about the screen refresh.
    ///
    struct Tick {

JoshuaSullivan

import UIKit
import NaturalLanguage
import PlaygroundSupport

//: Your secret API key from `https://dictionaryapi.com` goes here.
//: THIS WON'T WORK UNLESS YOU GET A KEY.
let thesaurusKey = ""

//: The string you want to work on.
var testString = "The bright sun set behind the green hills. Thin clouds streaked the red sky."

JoshuaSullivan

import Foundation
import CoreImage

struct FilterInput {

    struct ValueRange {
        let minValue: Float
        let maxValue: Float
        let sliderMin: Float?
        let sliderMax: Float?

JoshuaSullivan

=========================
Color Absolute Difference
=========================

[Availability]
	  iOS: 14
	macOS: 11.0

[Categories]
	Color Adjustment, Video, Interlaced, Non-Square Pixels, Still Image, Built-In

JoshuaSullivan

import Foundation

/// A type that can be initialized from a string value.
///
public protocol StringInitable {
    /// Initialize the object with a string.
    ///
    /// - Note: This operation can fail if the string is not valid for this object type.
    ///
    init?(_ string: String)

JoshuaSullivan

Midjourney Quick-Start Guide

Midjourney is a commercial image generation and transformation AI service. Similar services include:

• DALL-E 2 (Microsoft)
• Nightcafe
• Stable Diffusion (Open Source)

Midjourney is a somewhat opinionated AI and tends to try to create "art". It has a very high level of coherence, which means elements in the resulting images tend to have natural relationships with a low level of glitches and random weirdness. In my opinion, Midjourney has much higher quality "out of the box", trouncing the competition unless the user is quite advanced at effectively utilizing both positive and negative prompt particles.

JoshuaSullivan

/// Represents a point on a grid.
///
/// - Note: Instances of this type are not bound to any particular Grid and may be invalid depending on the size of the grid.
///
public struct GridCoordinate: Equatable, Hashable, CustomStringConvertible {
    
    /// The origin point of the grid.
    public static let zero = GridCoordinate(x: 0, y: 0)
        
    /// The column (East/West) position of this coordinate.