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extension Optional where Wrapped == String {
	var isNilOrEmpy: Bool {
		return self?.isEmpty ?? true
	}
}

ericjkunz

import UIKit

extension UIColor {
	func withBrightnessComponent(_ brightness: CGFloat) -> UIColor {
		var h: CGFloat = 0
		var s: CGFloat = 0
		var a: CGFloat = 0
		getHue(&h, saturation: &s, brightness: nil, alpha: &a)
		return UIColor(hue: h, saturation: s, brightness: brightness, alpha: a)
	}

ericjkunz

Best in Class iOS Apps

What things can I quantify that help make an app great?

A summary of: A Best in Class iOS App

The five sections this document covers are:

1. Accessibility: Designing for everyone is the right thing to do, and the best apps do it and they do it exceptionally well.
2. Platform Technology: Apple loves it when apps utilize their new APIs to great effect, you should too. It’s not about shoehorning features, it’s about looking at your product and seeing how to utilize iOS around it.

ericjkunz

import UIKit

extension UIStackView {
    
    open override var intrinsicContentSize: CGSize {
        var size = arrangedSubviews.reduce(CGSize.zero) { size, view -> CGSize in
            var size = size
            switch axis {
            case .horizontal:
                size.width += view.intrinsicContentSize.width

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    func shouldPerformIntensiveUnecessaryAnimation() -> Bool {
        return ProcessInfo.processInfo.thermalState != ProcessInfo.ThermalState.critical ||
            !ProcessInfo.processInfo.isLowPowerModeEnabled ||
            !UIAccessibilityIsReduceMotionEnabled() ||
            !(UIDevice.current.batteryLevel < 10 && UIDevice.current.batteryState == .unplugged)
    }

ericjkunz

import Foundation
extension UnitDuration {
    
    /// the time a beard takes to grow one inch
    static var beardInches: UnitDuration {
        return UnitDuration(symbol: "beardInches", converter: UnitConverterLinear(coefficient: 2526336))
    }
    
    /// the mathematician John von Neumann used the term microcentury to denote the maximum length of a lecture
    static var microCenturies: UnitDuration {

ericjkunz

infix operator <> { associativity none precedence 135 }

func <>(lhs: Int, rhs: Int) -> CountableRange<Int> {
    return (lhs + 1)..<rhs
}