![]() ![]() The method below demonstrates how to use the firstOrNull() method. If no element matches the given predicate function, then null is returned. size is: +x.size) println(Please find the index of the july string is : +x. This method returns the first element from the list that satisfies the provided the predicate. Kotlin list is one of the features and its the interface for generic. As we have a list of objects, we will compare the object properties in the predicate. Based on this predicate, it will return the first element found or null if no element is found. using find() : find() takes one predicate that returns one boolean. ![]() An example of a list is a telephone number: it's a group of digits, their order is important, and they can repeat. Kotlin provides different ways to find values in a list. Elements can occur more than once in a list. This method takes a predicate function as an argument. The following collection types are relevant for Kotlin: List is an ordered collection with access to elements by indices integer numbers that reflect their position. ![]() Syntax to get the first element that matches the predicate fun List.firstOrNull( Returns the first element if the ArrayList is not empty. Syntax to get the first element // to get first element If no element matches the provided predicate function, then null is returned. To get the first element of the ArrayList that satisfies the provided predicate function Predicate is a Functional interface, which takes one argument and returns either true or false based on the condition defined. This codelab discusses how to work with multiple values in your code, and introduces a variety of data structures, including arrays, lists, sets, and maps.If the ArrayList is empty, then null is returned. To get the first element of the ArrayList.The firstOrNull() method can be used in two ways.
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