val opList = operations.computeIfAbsent(
    basePath
) { key: String? -> ArrayList() }

?.

build/generated-src/antlr/main

package com.example.antlr

val antlrGeneratedFilesDirectory = file("${buildDir}/generated-src/antlr/main")
idea {
    module {
        generatedSourceDirs.add(antlrGeneratedFilesDirectory)
        sourceDirs.add(antlrGeneratedFilesDirectory)
    }
}

val aMap= mapOf("one" to 1,"two" to 2)



fun main() {
    
    aMap.mapValues { (z,y)-> "$"+z;"$"+y }.forEach{z->println(z)}

}

fun <P : Enum<P>> BaseConstraints<out Any, P>.validEnum(
    init: Unit.() -> Unit
) {
    this.rules.add(ValidEnum())
}

validEnum<Status> {  }

validEnum<Status?> {  }

fun <P : Enum<P>> BaseConstraints<out Any, P?>.validEnum(
    init: Unit.() -> Unit
) {
    this.rules.add(ValidEnum())
}

validEnum<Status> {  }

val purchasedTickets: Int = 10

val totalTickets: Int = 100

percentagePurchased = (purchasedTickets/ totalTickets) * 100

*val* reader = FileReader("test.txt")

reader.*use* {

reader.read()

}

FileReader("test.txt").use { reader -> read("something") }

fun foo(vararg words: String) {
    val a: Array<String> = words
}

Type mismatch.
Required: Array<String>
Found: Array<out String>

fun main() {
    val num = 5.0
    val num0 = String.format(Locale.ENGLISH, "%02.0f", num)
    val num2 = String.format(Locale.ENGLISH, "%02.2f", num)
    println("num0 = $num0, num2 = $num2")
}

private var aVariableToKeepTrackOfSomeData : SomeClass? = null

fun AnotherClass.myExtentionFunction() {
    // do stuff here with the variable
}

state.myList[index] = state.myList[index].copy(isFollowing = !state.myList[index].isFollowing!!)

isFollowing

enum class LootType {
    POTION, RING, ARMOR
}

class Loot(val name: String, val type: LootType, val value: Double) {
}

fun main(args: Array<String>) {
    ...
    val redPotion = Loot("Red Potion", lootType.POTION, 7.5)
}

enum class Example(val str: String) {
    header("123")
}

header