Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Kotlin - Padrões e Boas Práticas
Search
Rafael Toledo
November 18, 2017
Programming
1
720
Kotlin - Padrões e Boas Práticas
Apresentada no DevFest Belo Horizonte 2017
Rafael Toledo
November 18, 2017
Tweet
Share
More Decks by Rafael Toledo
See All by Rafael Toledo
Gamedev com Kotlin Native
rafaeltoledo
0
80
Kotlin Multiplataforma: Compartilhando código entre Android e iOS
rafaeltoledo
0
290
Motion Layout
rafaeltoledo
1
130
Pipeline Android
rafaeltoledo
3
160
Android Architecture Components
rafaeltoledo
7
160
What's New in Kotlin 1.3
rafaeltoledo
0
150
An Overview of Multiplatform Kotlin
rafaeltoledo
2
120
Compartilhando Código com Kotlin Multiplataforma
rafaeltoledo
2
260
Android Assíncrono
rafaeltoledo
3
220
Other Decks in Programming
See All in Programming
止められない医療アプリ、そっと Swift 6 へ
medley
1
120
いま中途半端なSwift 6対応をするより、Default ActorやApproachable Concurrencyを有効にしてからでいいんじゃない?
yimajo
2
340
Local Peer-to-Peer APIはどのように使われていくのか?
hal_spidernight
2
450
iOSアプリの信頼性を向上させる取り組み/ios-app-improve-reliability
shino8rayu9
0
150
NetworkXとGNNで学ぶグラフデータ分析入門〜複雑な関係性を解き明かすPythonの力〜
mhrtech
3
1k
階層構造を表現するデータ構造とリファクタリング 〜1年で10倍成長したプロダクトの変化と課題〜
yuhisatoxxx
3
910
2分台で1500examples完走!爆速CIを支える環境構築術 - Kaigi on Rails 2025
falcon8823
3
3.1k
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
130
LLMとPlaywright/reg-suitを活用した jQueryリファクタリングの実際
kinocoboy2
4
670
CSC509 Lecture 01
javiergs
PRO
1
430
WebエンジニアがSwiftをブラウザで動かすプレイグラウンドを作ってみた
ohmori_yusuke
0
170
育てるアーキテクチャ:戦い抜くPythonマイクロサービスの設計と進化戦略
fujidomoe
1
150
Featured
See All Featured
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
33
2.5k
Why Our Code Smells
bkeepers
PRO
339
57k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
15k
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
GraphQLの誤解/rethinking-graphql
sonatard
73
11k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
32
2.2k
Intergalactic Javascript Robots from Outer Space
tanoku
273
27k
Fireside Chat
paigeccino
40
3.7k
Become a Pro
speakerdeck
PRO
29
5.5k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
30
2.9k
YesSQL, Process and Tooling at Scale
rocio
173
14k
Side Projects
sachag
455
43k
Transcript
None
None
None
None
None
None
None
None
None
User user = new User(); user.setName("Rafael Toledo"); // Obrigatório user.setEmail("
[email protected]
");
// Obrigatório user.setPhone("+55 11 99999-9999"); // Opcional
User user = new User.Builder("Rafael Toledo", "
[email protected]
") .phone("+55 11 99999-9999")
.build();
class User(val name: String, val email: String, val phone: String?
= null) User(name = "Rafael Toledo", email = "
[email protected]
")
class User(val name: String, val email: String, val phone: String?
= null) User(name = "Rafael Toledo", email = "
[email protected]
", phone = "+55 11 99999-9999")
taxCalculator { country = Tax.COUNTRY_BRAZIL period { from = date("2017-01-01")
to = date("2017-10-31") } type = Tax.TYPE_IRPF payment { type = Tax.PAYMENT_BANK_TRANSFER bank { agency = "1234" account = "012345-9" ...
None
fun ViewGroup.inflate(layoutRes: Int, attachToRoot: Boolean = false): View { return
LayoutInflater.from(context).inflate(layoutRes, this, attachToRoot) }
None
None
None
None
None
validateAddress(addressFrom(jsonNode)) validateAddress(jsonNode.toAddress()) private fun JsonNode.toAddress() = Address( getRequired("street").asText(), getRequired("town").asText(), get("postcode")?.asPostCode(),
getRequired("country").asCountryCode())
validateAddress(addressFrom(jsonNode)) validateAddress(jsonNode.toAddress()) private fun JsonNode.toAddress() = Address( getRequired("street").asText(), getRequired("town").asText(), get("postcode")?.asPostCode(),
getRequired("country").asCountryCode())
// Antes enableCheckbox(isFreeDelivery(addressFrom(jsonNode))) // Depois enableCheckbox(jsonNode.toAddress().isFreeDelivery())
// Antes if (userCanEditSubmission(currentUser, submission)) { ... } // After
if (currentUser.canEdit(submission)) { ... }
None
None
None
None
None
None
None
None
None
None
if (savedInstanceState != null) { ... } savedInstanceState?.let { ...
}
None
None
// Confuso if (value?.isTrue ?: false) { ... } //
Parece redundante, mas é mais claro! if (value?.isTrue == true) { ... }
None
None
None
None
None
None
None
None
None
None
None
None
None
None
@Deprecated("Use X instead") @Throws(ExceptionInInitializerError::class) fun relevantMethod() { ... }
None
// Em vez de apply plugin: "kotlin-android" apply plugin: "kotlin-android-extensions"
// Por que não... apply plugin: "org.jetbrains.kotlin.android" apply plugin: "org.jetbrains.kotlin.android.extensions" apply plugin: "org.jetbrains.kotlin.kapt"
None
None
None