Evan Roth eroth

Keychain API

Protection Domain (pdmn)	Keychain Accessibility Values
`ck`	`kSecAttrAccessibleAfterFirstUnlock`
`cku`	`kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly`
`dk`	`kSecAttrAccessibleAlways`
`akpu`	`kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly`

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).



	import UIKit
	import PlaygroundSupport

	// Create a view to display the result in playground
	let view = UIView(frame: CGRect(x: 0, y: 0, width: 500, height: 500))
	view.backgroundColor = .white
	PlaygroundPage.current.liveView = view;