/**
 * __define-ocg__ Android Filter Movies
 * This function removes duplicate log items based on username
 * and removes the id=NUM property and value from each log item.
 *
 * @param logItems The input string containing log items separated by semicolons.
 * @return A new string with the specified requirements.
 */
fun logDumpGetUnique(logItems: String): String {
    val logList = logItems.split(";").toMutableList()
    val uniqueUsernames = mutableSetOf<String>()

    // Iterate through the log items and filter based on username
    val filteredLog = logList.filter {
        val username = it.substringAfter("username=").substringBefore(",")
        if (!uniqueUsernames.contains(username)) {
            uniqueUsernames.add(username)
            true
        } else {
            false
        }
    }

    // Remove the id=NUM property and value from each log item
    val sanitizedLog = filteredLog.map { log ->
        var mutableLog = log
        val idIndex = mutableLog.indexOf("id=")
        if (idIndex != -1) {
            val commaIndex = mutableLog.indexOf(",", idIndex)
            if (commaIndex != -1) {
                mutableLog = mutableLog.removeRange(idIndex, commaIndex + 1)
            } else {
                mutableLog = mutableLog.removeRange(idIndex, mutableLog.length)
            }
        }
        mutableLog
    }

    // Join the sanitized log items into a single string
    val result = sanitizedLog.joinToString(";")

    return result
}

fun main() {
    val input = "name=Dan B, username=db, [email protected], id=123; name=Hannah, username=hsmith, id=333, [email protected]; name=Dan Brick, username=db, [email protected], id=663;"
    val output = logDumpGetUnique(input)
    println(output)
}

Kotlin online compiler

Write, Run & Share Kotlin code online using OneCompiler’s Kotlin online compiler for free. It’s a modern and fast online playground for Kotlin, supporting the latest version and ideal for learning, experimenting, and sharing code instantly.

About Kotlin

Kotlin is a statically typed, modern programming language developed by JetBrains. It runs on the JVM and is fully interoperable with Java. Kotlin is concise, expressive, and safe, and it’s officially supported by Google for Android app development.

Sample Code

The following is a simple Kotlin program that prints a greeting:

fun main() {
    println("Hello, OneCompiler!")
}

Taking inputs (stdin)

OneCompiler’s Kotlin editor supports stdin. You can provide input using the I/O tab. Here's a sample program that reads a line of input and prints a greeting:

fun main() {
    print("Enter your name: ")
    val name = readLine()
    println("Hello, $name")
}

Syntax Basics

Variables

val name: String = "OneCompiler"  // Immutable
var age: Int = 25                 // Mutable

Kotlin supports type inference, so explicit types are optional:

val city = "Hyderabad"
var count = 10

Conditionals

val score = 85
if (score >= 50) {
    println("Pass")
} else {
    println("Fail")
}

Loops

For loop

for (i in 1..5) {
    println(i)
}

While loop

var i = 1
while (i <= 5) {
    println(i)
    i++
}

Do-While loop

var j = 1
do {
    println(j)
    j++
} while (j <= 5)

Functions

fun add(a: Int, b: Int): Int {
    return a + b
}

fun greet(name: String) = "Hello, $name"

Collections

val items = listOf("apple", "banana", "cherry")
for (item in items) {
    println(item)
}

This guide provides a quick reference to Kotlin programming syntax and features. Start coding in Kotlin using OneCompiler’s Kotlin online compiler today!