みんな exists を使ってます。 納得できようができまいが、exists なのです。 ソフトウェアの世界では、Apple と Microsoft と Google が黒と言ったら黒です。 黙って従いましょう。 このように、関数名の表現に困ったら、世の中の API を参考にすると良いです。 非ネイティブの我々では思いつかないような的確な表現が見つかることもあります。 関数の名付け方 真偽値を返す関数は if 文で使われることが多いので、頭に if を置いて最もしっくり来る表現が良いと思います。 個人的には、真偽値を返す関数名を考えるときは以下のフォーマットに当てはめるようにしています。 if オブジェクト名 関数名 「項目が選択中だったら」なら "if item is selected" なので関数名は item.isSelected() となります。 同様に「項目が存在したら」なら "

About the content This talk was delivered live in March 2017 at try! Swift Tokyo. The video was recorded, produced, and transcribed by Realm, and is published here with the permission of the conference organizers. Libraries are the future for sharing your code, but they’re also fraught with peril. Platforms, package managers and tests are all crucial for your successful library! In this talk from

About the content This talk was delivered live in March 2017 at try! Swift Tokyo. The video was recorded, produced, and transcribed by Realm, and is published here with the permission of the conference organizers. Don Norman’s "The Design of Everyday Things" is a classic design book, focused on the design of physical objects. Many of the principles that he discusses are also applicable to non-phys

About the content This talk was delivered live in March 2017 at try! Swift Tokyo. The video was recorded, produced, and transcribed by Realm, and is published here with the permission of the conference organizers. Do you want to contribute to Swift? Not sure how or where to begin? It can be overwhelming! In this talk from the inaugural try! Swift conference, Jesse will help you explore the differe

このたび、 Realm Cocoa Converter をオープンソースのライブラリとしてリリースしました！Realm Objective-CとRealm Swiftに足りない部分を補完する役割があります。 これまで開発者のみなさまから、もっと簡単に既存のデータをRealmに変換したい、それをするために開発のかなりの時間を費やしている、との声をたくさんいただいていました。Realm Cocoa Converterはさまざまなデータ形式のファイルからRealmにデータをインポートする、あるいはRealmから別のファイル形式にデータをエクスポートする機能を提供するライブラリです。 このライブラリはSwiftで書かれており、そしてとても簡単に使うことができます。例えばRealmからデータをエクスポートする場合は、あるクラスを１つ使用するだけです。下記の例はRealmのデータをCSVファイルにエク

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Swift is Open Source! Finally! Swift is open source, under the Apache 2.0 license. Not only did we get the Swift source code, but also a surprise package manager! The package manager is also open source, so anyone can contribute to what is sure to be the new default dependency manager. We are so excited about this huge open source project! 🎉 Apple also launched swift.org, a new website for Swift

Core Dataを使ってきた印象 まずCore Dataについての記述が多くなります。 興味無い方はスキップしてください。 Core Dataじっくり使ったことないと分からない記述があると思います。 APIが複雑 Swift - iOSアプリでデータベースを使う時に必要な知識をまとめてみた - Qiitaの前半に良い感じにまとめられていますが、全貌を把握するのがちょっと大変です。 NSManagedObjectContextの扱いにコツがいる Core Dataはスレッド間でNSManagedObjectContext(以下contextと表記)を使い回すことが出来ません。 (contextとはRealmオブジェクトのようなものです。) つまりUIスレッドをブロックしないようにバックグラウンドスレッドで保存処理などしようとすると、それ用のcontextを生成する必要があります。 さらにそ

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About the content This content has been published here with the express permission of the author. So you’ve got a huge view controller that knows about everything. It’s become a puppeteer mastermind whose responsibilities have somehow grown to simultaneously encompass disk I/O and navigation bar styling. Andy Matuschak live codes solutions to reduce the size of the beast, and refactors out its res

We’re happy to announce that Realm’s recent agreement with uPhyca Inc. has resulted in Makoto Yamazaki, a.k.a. @zaki50, joining our team! Makoto will support Realm’s development in Japan, focusing mainly on the Android platform. 株式会社ウフィカとRealmが契約を結び、山﨑 誠(@zaki50)がRealmの活動に加わることになりました！ 主にAndroidを中心に、Realm自体の開発と日本における利用を支援してまいります。 As a seasoned Java and Android expert, Makoto has already developed m

About the content This content has been published here with the express permission of the author. If you’ve ever needed to know how another piece of code works, or have been at the mercy of someone else’s bugs, you can always look at the source code… unless you don’t have it. In this talk, Conrad covers many concepts & tools that can used to reverse-engineer existing apps, as well as debug other l

To celebrate the arrival of iOS 9, we asked a few of our friends to share the most useful thing they learned when looking to update their apps to support this latest version of iOS. Here is some fantastic advice to to get up to speed and make the most of development for iOS 9. It’s rare that a new API in the iOS SDK actually helps with app discovery and marketing. So, for me some of the most excit

speakerdeck.com Realmとはmobile向けのDBなのだけど、みてねでは7月にリリースしたv1.5.0から利用していて、その経緯とか背景とか実装内容ついて話してきました。 内容的には他の人とか過去の発表と被るのを避けるためRealm的な話は薄くて、普段の開発スタイルとか同期APIの実装の話がメインだったりする。 あと質疑応答で、「今回の実装でAndroidとiOSで設計が違ってきた場所ってなんですか？」という質問があって「AndroidはRxJavaを使って通知を飛ばしてUIにデータを反映させてるが、iOSだとNSNotificationCenterを使って素朴に実装している」みたいな返答しちゃったけどiOSではモデルをKVOで監視してUIに反映の間違いでした。（細かい） 懇親会では、スクラムを導入したい・しているけどよくわからない的な方々とお話する機会があり、 うちでは

About the content This content has been published here with the express permission of the author. Testing almost always helps catching bugs and write better code, but it can be a huge pain without a proper framework and setup. At the Bay Area Android Dev Group meeting, Ellen Shapiro explains how to super-charge your Android testing, including UI testing, with JUnit 4 and Espresso 2. She demonstrat

About the content This content has been published here with the express permission of the author. The Apple Watch operating system now has a proper name and struts some brand new tricks. If you learned how to use WatchKit over the past year, you might find it fun that apps now can run on the Watch hardware and take advantage of the sensors. Ben steps through real-world use cases of apps written fo

In this post, we explore the nature of Swift’s new error type, looking at the possibilities and restrictions for testing error handling implementations. We end with an illustrative example, and some helpful resources. How to Implement the ErrorType Protocol If we jump to the definition of the ErrorType protocol in the Swift standard library, we see that it doesn’t contain many obvious requirements

About the content This content has been published here with the express permission of the author. Thorben Primke introduces Flow and Mortar, two Android libraries written by Square, at the Bay Area Android Dev Group. He will not only discuss them, but also go through a sample application, as well as helper classes that he leverages to reduce boilerplate code and handle lifecycle events. Background

About the content This content has been published here with the express permission of the author. Current methods of API versioning don’t actually solve the problem of breaking changes — they just delay them. Kyle Fuller presents the REST architecture as a means of allowing changes in API & API clients to develop independently. While dispelling common misconceptions about REST, he’ll demonstrate h

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