The first and most straightforward way of finding the variable type in Kotlin is to use the is keyword. It does not give you the exact variable type but allows checking the type.You can use the is keyword to determine if the variable type is the same as what you think it is. You ...
In Kotlin, we can use theFilebuilt-inexists()method to check if a file exists. 1. Using Kotlin to Check if a File Exists In Kotlin, we use theexists()function from theFileclass. Here’s how it looks: CheckFile.kt importjava.io.Filefunmain(){valfile = File("example.txt")if(file...
In this tutorial, we’ll learn different ways in Kotlin to check whether a number is Fibonacci. 2. What Is Fibonacci Series? The Fibonacci series is a well-known mathematical sequence of numbers where we represent each number as the sum of the previous two numbers: 0, 1, 1, 2, 3, 5...
To check if String starts with specified character in Kotlin, use String.startsWith() method. str1.startsWith(ch) returns a boolean value of true if the string str1 starts with the character ch, or false if not.
Use The Jackson Library To Parse String In Kotlin Jackson is a popular library of Kotlin to parse and manipulate JSON data. The library supports both the reading as well as writing JSON data. The advantage of using this library is that we do not need to parse the data manually. The libra...
Learn how to build an API in Spring Boot and Kotlin that uses Twilio’s Programmable Voice to make an outbound phone call to a given contact.
type Foo={bar?:Bar}type Bar={baz?:Baz}type Baz={qux?:number} When things were less deeply-nested, we could do a singletypeofcheck. But look at this expression: foo.bar?.baz?.qux It’s guaranteed to be either anumberorundefined. It’ll be the latter if any ofbar,baz, orquxor ...
Check the Data Type UsingwhenExpression By using thewhenexpression in Kotlin, we can check the data type of the provided variable. It is done with the help of the conditional branching method. We will use theiscondition that helps type check a variable. ...
If this type of OOM is thrown, you might need to use troubleshooting utilities on your operating system to diagnose the issue further. In some cases, the problem might not even be related to the application. For example, you might see this error if: ...
@Entity(tableName ="notes")dataclassNote(@PrimaryKey@ColumnInfo(name ="dateAdded")valdateAdded: Date,@ColumnInfo(name ="noteText")valnoteText: String )Code language:Kotlin(kotlin) IMPORTANT!You always have to set a primary key (@PrimaryKey) in the database schema. ...