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Atividades realizadas durante o bootcamp Dev Venture

Dev-Venture

Atividades

Soma dos valores de um array

fun simpleArraySum(ar: Array<Int>): Int = ar.sum()

Koans

Introdução

Named arguments

fun joinOptions(options: Collection<String>) =
options.joinToString(prefix= "[", postfix = "]")

Default arguments

fun foo(name: String, number: Int = 42, toUpperCase: Boolean = false) =
(if (toUpperCase) name.uppercase() else name) + number

Triple-quoted strings

val tripleQuotedString = """
#question = "$question"
#answer = $answer""".trimMargin("#")

String templates

fun getPattern(): String = """\d{2} $month \d{4}"""

Nullable types

fun sendMessageToClient(client: Client?, message: String?, mailer: Mailer) {
    val personalInfo = client?.personalInfo
    val email = personalInfo?.email
   
    if(email == null || message == null) return
    
    mailer.sendMessage(email, message)
}

Nothing type

fun failWithWrongAge(age: Int?): Nothing  {
		throw IllegalArgumentException("Wrong age: $age")
}

Lambdas

fun containsEven(collection: Collection<Int>): Boolean =
        collection.any { it % 2 == 0 }

Desafios

Aplicativo Jogue Os Dados

Aplicativo Layout Calculadora

fwtrodrigo/dev-venture

Dev-Venture - Registros

Dev-Venture