| public struct TextSize { | |
| fileprivate struct CacheEntry: Hashable { | |
| let text: String | |
| let font: UIFont | |
| let width: CGFloat | |
| let insets: UIEdgeInsets | |
| fileprivate var hashValue: Int { | |
| return text.hashValue ^ Int(width) ^ Int(insets.top) ^ Int(insets.left) ^ Int(insets.bottom) ^ Int(insets.right) |
First off, thank you for taking the time to interview with the Lattice team. We know your creativity and time are valuable and we're excited you are willing to share some of it with us.
We would like you to build a small web app for finding information about all of your favorite movies using the The Movie Database API.
| import UIKit | |
| public enum Bit: Int { | |
| case zero | |
| case one | |
| } | |
| extension Bit { | |
| func inverted() -> Bit { | |
| return self == .zero ? .one : .zero |
let kCMBlockBufferNoErr = 0
let kCMBlockBufferStructureAllocationFailedErr = -12700
let kCMBlockBufferBlockAllocationFailedErr = -12701
let kCMBlockBufferBadCustomBlockSourceErr = -12702
let kCMBlockBufferBadOffsetParameterErr = -12703
let kCMBlockBufferBadLengthParameterErr = -12704
let kCMBlockBufferBadPointerParameterErr = -12705
let kCMBlockBufferEmptyBBufErr = -12706
let kCMBlockBufferUnallocatedBlockErr = -12707
__________
[Bus 1: Mic]-->| |-->[Bus 1: App]
| RemoteIO |
[Bus 0: App]-->| |-->[Bus 0: Speaker]
----------
let status = AudioUnitSetProperty(audioUnit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, UInt32(bus), &enableIO, UInt32(MemoryLayout.size))
State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?
There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.
Here I present a composable pattern for pure state machiness with effects,
| // | |
| // RecordRemoteIO.m | |
| // AudioTest | |
| // | |
| // Created by Mark Stultz on 5/5/15. | |
| // Copyright (c) 2015 Mark Stultz. All rights reserved. | |
| // | |
| #import <AudioToolbox/AudioToolbox.h> | |
| #import "RecordRemoteIO.h" |