//从 1 到 10
for (i in 1..10) {
    //1,2,3,4,5,6,7,8,9,10
    println(i)
}

//从 1 到 9
for (i in 1 until 10) {
    //1,2,3,4,5,6,7,8,9
    println(i)
}

//从 10 到 1
for (i in 10 downTo 1) {
    //10,9,8,7,6,5,4,3,2,1
    println(i)
}

//从 1 到 10 步长为 2
for (i in 1..10 step 2) {
    //1,3,5,7,9
    println(i)
}

//从 0 到 9
repeat(10) {
    //0,1,2,3,4,5,6,7,8,9
    println(it)
}

val list = arrayListOf<String>("A", "B", "C", "D")
for (str in list) {
    //A,B,C,D
    println(str)
}

val list = arrayListOf<String>("A", "B", "C", "D")
for ((index,str) in list.withIndex()){
    //index 从 0 开始
    println("第${index}个的元素是$str")
}

fun main(args: Array<String>) {
    val user = User(12,"zs")
    val (age,name,user_data) = user
    println("age = ${age}")
    println("name = ${name}")
    println("user_data = ${user_data}")
}

class User(var age: Int, var name: String) {
    //operator 将 一个函数 标记为 重载一个操作符 或实现 一个约定
    operator fun component1() = age
    operator fun component2() = name
    operator fun component3() = "${age} ${name}"
}

class Book(var name: String, var price: Float) {
    operator fun component1(): String {
        return name
    }

    operator fun component2(): Float {
        return price
    }
}

fun main(args: Array<String>) {
    val (name, price) = Book("Kotlin入门", 66.6f)
    println(name)
    println(price)
}

fun main(args: Array<String>) {
    val (name,price) = getBookInfo()
    println("name = ${name}")
    println("price = ${price}")
}

fun getBookInfo(): Book {
    return Book("Kotlin入门", 66.6f)
}

data class Book(var name: String, var price: Float)

fun main(args: Array<String>) {
    val array = arrayOf(1, 2, 3)
    val (a1, a2, a3) = array
    println("$a1")
    println("$a2")
    println("$a3")
    
    val list = listOf(1, 2, 3)
    val (b1, b2, b3) = list
    println("$b1")
    println("$b2")
    println("$b3")
    
    val map = mapOf("key1" to 1, "key2" to 2, "key3" to 3)
    for ((key, value) in map) {
        println("$key-$value")
    }
}

val (_, price2) = Book("Kotlin入门", 66.6f)    

//Test.kt

fun echo(name: String) {
    System.out.println(name)
}

//Test.kt
 
//自定义编译后生成的文件名
@file:JvmName("TestDemoCode")
//编译后会强制性的把多个文件内容合并在一起
@file:JvmMultifileClass
package com.jetpack.compose.demo.test
fun echo(name: String) {
    System.out.println(name)
}

fun main() {
    // TestDemoJave.java
    testClass(TestDemoJave::class.java)
    testKClass(TestDemoJave::class)
    // TestDemoKotlin.java
    testKotlinClass(TestDemoKotlin::class)
}

fun testClass(clazz: Class<TestDemoJave>) {
    println(clazz.simpleName)
}

fun testKClass(clazz: KClass<TestDemoJave>) {
    println(clazz.simpleName)
}

fun testKotlinClass(clazz: KClass<TestDemoKotlin>) {
    println(clazz.simpleName)
}

//TestDemoKotlin.kt

object TestDemoKotlin {
    @JvmStatic
    fun sayMessageStatic(msg: String) {
        println(msg)
    }

    fun sayMessage(msg: String) {
        println(msg)
    }
}

fun function() {
    val str = "hello world"
    //函数嵌套
    fun say(count: Int = 10) {
        println(str)
        if (count > 0) {
            say(count - 1)
        }
    }
    say()
}

//TestDemoKotlin.kt

fun String?.isNoEmpty(): Boolean {
    return this != null && this.length > 0
}

val lambdaA = { a: Int, b: Int, c: Int, d: Int, e: Int, f: Int, g: Int, h: Int,i: Int, j: Int, k: Int, l: Int, m: Int, n: Int, o: Int, p: Int, q: Int, r: Int, s: Int, t: Int, u: Int, v: Int, w: Int ->
    println("zhang tao")
}

fun main(args: Array<String>) {
//    print("hello")
    lambdaA(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1)
}

@Composable
fun ComposableSample() {
    Column(Modifier.fillMaxWidth()) {
        Text("Hello Word Hello Word Hello Word")
        //分割线
        Divider(
            //颜色
            color = Color.Blue,
            //线的高度
            thickness = 1.dp,
            //距离开始的间距
            startIndent = 10.dp
        )
        Text("Hello Word")
        //分割线
        Divider(
            Modifier
                .fillMaxWidth()
                .height(1.dp)
                .padding(start = 10.dp, end = 10.dp),
            //颜色
            color = Color.Green,
        )
        Text("Hello Word Hello Word")
        Text("Hello Word Hello Word Hello Word")
    }
}