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3 min readTo add slashes between the characters of a string in Kotlin, you can use the joinToString function with a delimiter of /. This function allows you to concatenate all characters in the string with the specified delimiter in between each character. Here is an example of how you can achieve this: val originalString = "hello" val stringWithSlashes = originalString.
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4 min readTo check if three numbers are different in Kotlin, you can compare them using conditional statements. You can use nested if-else statements to compare each pair of numbers and ensure that all three numbers are different from each other. You can also use the distinct function to remove duplicate elements from a list or array containing the three numbers, and then check if the size of the resulting list is equal to 3. This would indicate that all three numbers are different.
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7 min readIn Kotlin, you can use the sortedBy function to sort a list of objects based on a specific property of the objects. For example, if you have a list of objects of type Person and you want to sort them based on their age, you can call sortedBy { it.age } on the list. This will return a new list containing the objects sorted in ascending order based on their age. If you want to sort them in descending order, you can use sortedByDescending { it.age }.
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7 min readTo run blocking Java code concurrently in Kotlin, you can use the runBlocking function from Kotlin's coroutine library. This function allows you to execute blocking code within a coroutine without blocking the main thread. You can use this function to wrap your Java blocking code and execute it concurrently in a coroutine. This way, you can take advantage of Kotlin coroutines to run your blocking code efficiently and concurrently without blocking the main thread.
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3 min readIn Kotlin, you can return an object from a function by simply specifying the object's type as the return type of the function. Inside the function, you can create an instance of the object using the return keyword followed by the object itself.
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5 min readTo listen to an URL in Kotlin, you can use the HttpUrlConnection class to establish a connection with the server hosting the URL. You can then open a input stream to read the data from the URL and process it accordingly. It is important to handle any exceptions that may occur during the connection or data retrieval process. Additionally, you may consider using libraries like Retrofit or OkHttp for more robust and efficient URL listening capabilities in your Kotlin project.
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4 min readTo add a new element to a map in Kotlin, you can simply use the put() function. This function takes two arguments: the key and the value of the new element you want to add. Here's an example:val map = mutableMapOf<String, String>() //Create a mutable map map.
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4 min readThe double pipe operator in Kotlin is represented by || and is used as the logical OR operator. This operator is typically used to combine two boolean expressions. It returns true if at least one of the expressions is true, otherwise it returns false. This operator is commonly used in conditional statements and expressions to make decisions based on multiple conditions. It provides a concise and readable way to express logical OR operations in Kotlin code.
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4 min readTo downgrade Kotlin version, you'll need to uninstall the current version and then download and install the desired older version. First, check the current version of Kotlin in your project or system. Next, remove the current version of Kotlin by deleting the necessary files or using the package manager that was used for installation. After uninstalling, download the desired older version of Kotlin from the official website or repository.
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3 min readTo swap two numbers in Kotlin using a function, you can create a function that takes two integer parameters and swaps their values using a temporary variable.Here is an example of a function that swaps two numbers in Kotlin: fun swapNumbers(a: Int, b: Int): Pair<Int, Int> { var temp = a a = b b = temp return Pair(a, b) } fun main() { var x = 10 var y = 20 println("Before swapping: x = $x, y = $y") val result = swapNumbers(x, y) x = result.
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5 min readTo wait for a Kotlin coroutine to finish, you can use the runBlocking function from the kotlinx.coroutines library. By executing the coroutine within a runBlocking block, the current thread will be blocked until the coroutine completes its execution.Another option is to use the join() function, which can be called on a coroutine instance. This function will also block the current thread until the coroutine completes.