이 글은 우리가 쓴 책, 'Reactive Programming with RxJava' 의 부록이었다. Reactive programming과 관련이 깊은 주제긴 하지만 모나드를 소개한다는 게 책과 썩 어울리지는 않았다. 그래서 나는 따로 블로그에 올리기로 했다. 프로그래밍을 다루는 블로그에서 *"반은 맞고 반은 틀릴 지 모르는 나만의 모나드 설명"*이란 것이 새로운 *"Hello World"*라는 점을 나도 잘 안다. 하지만 이 글은 펑터(functor)와 모나드(monad)를 자바 자료 구조와 라이브러리라는 각도에서 바라보고 있으며, 이는 공유할 정도의 가치는 있을거라 생각했다.
| func ==<U: Equatable, T: protocol<RawRepresentable, Equatable> where T.RawValue == U>(lhs: U, rhs: T) -> Bool { | |
| return lhs == rhs.rawValue | |
| } | |
| func !=<U: Equatable, T: protocol<RawRepresentable, Equatable> where T.RawValue == U>(lhs: U, rhs: T) -> Bool { | |
| return lhs != rhs.rawValue | |
| } |
| exec > /tmp/${PROJECT_NAME}_archive.log 2>&1 | |
| UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal | |
| if [ "true" == ${ALREADYINVOKED:-false} ] | |
| then | |
| echo "RECURSION: Detected, stopping" | |
| else | |
| export ALREADYINVOKED="true" |
Frequently, closures are used as completion callbacks for asynchronous operations, such as when dealing with network requests. It is quite common to model these sorts of operations in such a way that an object instance represents a request/response transaction, for example:
| How to Completely Remove Android Studio | |
| Execute these commands from the terminal | |
| rm -Rf /Applications/Android\ Studio.app | |
| rm -Rf ~/Library/Preferences/AndroidStudio* | |
| rm ~/Library/Preferences/com.google.android.studio.plist | |
| rm -Rf ~/Library/Application\ Support/AndroidStudio* | |
| rm -Rf ~/Library/Logs/AndroidStudio* |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| self.setUpLocationmanager() | |
| let beaconSequence = locationManager.rx_didRangeBeaconsInRegion.map{$0.beacons} | |
| let sortedBeaconSequence = beaconSequence.map{beacons in self.sortBeaconsByRSSI(beacons)} | |
| let nearestBeaconSequence = sortedBeaconSequence.map({$0[0]}) | |
| .filter{$0.proximity == CLProximity.Immediate} | |
| .distinctUntilChanged{$0.minor == $1.minor} |
| extension UITableView { | |
| /** | |
| Returns an index path identifying the row and section | |
| of the cell containing the provided view | |
| :param: cellSubview A subview of any given UITableViewCell in the table. Typically this is either a `UIButton` or `UITextField` | |
| */ | |
| func indexPathForCellWithSubview(cellSubview: UIView) -> NSIndexPath? { | |
| let cellFrame = convertRect(cellSubview.bounds, fromView: cellSubview) | |
| let cellCenter = CGPoint(x: CGRectGetMidX(cellFrame), y: CGRectGetMidY(cellFrame)) |
| 1. Open Terminal | |
| 2. cd to your Xcode project | |
| 3. Execute the following when inside your target project: | |
| find . -name "*.swift" -print0 | xargs -0 wc -l |
| #!/bin/bash | |
| # | |
| # This script makes an empty Swift file template. | |
| # | |
| # Usage: | |
| # | |
| # sudo ./change_xcode_template | |
| # | |
| # or specify the Xcode app name |
| //If you have a Bridging-Header: | |
| #import <FBSDKCoreKit/FBSDKCoreKit.h> | |
| #import <FBSDKLoginKit/FBSDKLoginKit.h> | |
| //In your AppDelegate: | |
| func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [String: AnyObject]?) -> Bool { | |
| //App launch code | |
| FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions) | |
| //Optionally add to ensure your credentials are valid: |
