Multiplatform Projectsの向かう先 #m3kt

Transcript

1. 5 / 8 # 2013
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5. ! # 1/02 fun main(args: Array<String>) { println("Hello world!") }
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   kotlin.io.readLine000 JVM 58 # 3126 / / fun main(args: Array<String>) { val name = readLine() println("Hello $name!") }
7. # 2013 / / import java.io.BufferedReader import java.io.File fun main(args: Array<String>) { val name = File("name.txt") .bufferedReader() .use { it.readLine() } println("Hello $name!") }
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     • 2 /-1 3 /- 20021 C 8 # # # 2 /-1 0 # fun main(args: Array<String>) { println("Hello world!") } 20021 2 /-1 5
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     • 15 2/ 2/- 0 1 # *5 2/ 3 1 fun main(args: Array<String>) { val name = readLine() println("Hello $name!") } *5 2/ 8
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     # 53 01 / 1 # import java.io.BufferedReader import java.io.File fun main(args: Array<String>) { val name = File("name.txt") .bufferedReader() .use { it.readLine() } println("Hello $name!") } 01 / 28
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     • /350-2 5 0- # # # 8 350-2 1 /5 # fun main(args: Array<String>) { window.alert("Hello World!") } 350-2
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       # 1/02 expect object Hello { fun say() }
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     # 2013 / / actual object Hello { actual fun say() = showDialog("Hello!") } actual object Hello { actual fun say() = window.alert("Hello!") }
17. • 72 3 8 • 2 5 # 1 0 / expect open class BigInteger(`val`: String) { open fun add(`val`: BigInteger): BigInteger } actual typealias BigInteger = java.math.BigInteger
     
18. • ,8 , 31132 13 0, 0 351 13 0, # # # 3 0 2 1 / # fun main(args: Array<String>) { val bi = BigInteger(”10”) val sum = bi.add(BigInteger(”20”)) ... }
    
19. • 8 9 0 0 351 13 0 # 3 0 2 1 / fun main(args: Array<String>) { val bi = BigInteger(”10”) val div = bi.divide(BigInteger(”5”)) ... }
    
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       • 4 30 / 0 8 4 K • 53354 58204 C TS K # 58204 3 18 val hoge: dynamic = object {} hoge.fuga = {} // OK hoge.piyo().xxx.yyy() // OK
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           • 351 2 3 23 3 8 K # 8 03 / 3 expect class System { companion object { fun currentTimeMillis(): Long } } // NG actual typealias System = java.lang.System
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           • 6 0 5 8 K 8 31 2 32 3 6 K # 360 2 1 /6 // OK actual class System { actual companion object { actual fun currentTimeMillis() = java.lang.System.currentTimeMillis() } }
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           • 7 0 5 8 K 8 31 2 32 3 K # 3 0 2 1 / // OK actual fun System.Companion.currentTimeMillis() = java.lang.System.currentTimeMillis() class System { companion object } expect fun System.Companion.currentTimeMillis(): Long
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