Kotlin - Padrões e Boas Práticas

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User user = new User(); user.setName("Rafael Toledo"); // Obrigatório user.setEmail("[email protected]"); // Obrigatório user.setPhone("+55 11 99999-9999"); // Opcional

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User user = new User.Builder("Rafael Toledo", "[email protected]") .phone("+55 11 99999-9999") .build();

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class User(val name: String, val email: String, val phone: String? = null) User(name = "Rafael Toledo", email = "[email protected]")

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class User(val name: String, val email: String, val phone: String? = null) User(name = "Rafael Toledo", email = "[email protected]", phone = "+55 11 99999-9999")

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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" ...

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fun ViewGroup.inflate(layoutRes: Int, attachToRoot: Boolean = false): View { return LayoutInflater.from(context).inflate(layoutRes, this, attachToRoot) }

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validateAddress(addressFrom(jsonNode)) validateAddress(jsonNode.toAddress()) private fun JsonNode.toAddress() = Address( getRequired("street").asText(), getRequired("town").asText(), get("postcode")?.asPostCode(), getRequired("country").asCountryCode())

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// Antes enableCheckbox(isFreeDelivery(addressFrom(jsonNode))) // Depois enableCheckbox(jsonNode.toAddress().isFreeDelivery())

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// Antes if (userCanEditSubmission(currentUser, submission)) { ... } // After if (currentUser.canEdit(submission)) { ... }

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if (savedInstanceState != null) { ... } savedInstanceState?.let { ... }

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// Confuso if (value?.isTrue ?: false) { ... } // Parece redundante, mas é mais claro! if (value?.isTrue == true) { ... }

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@Deprecated("Use X instead") @Throws(ExceptionInInitializerError::class) fun relevantMethod() { ... }

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// 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"