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In this article, We have seen how to convert Map to List in Kotlin programming and examples on different approaches.

Use toList() method on map object or keys, values properties. gets the keys and values as per the insertion Look at the below program and observer the output order.

To preserve the insertion order then need to use LinkedHashMap class instead of HashMap. Converting LinkedHashMap to List in Kotlin Using ArrayList Constructorįrom the above program, the output is not in the order what is inserted into the map. Map.values –> map.values() package .map.list These properties will be invoking the below functions internally when you are using.

Pass these values to ArrayList constructor to convert the map to list. Use map.keys and map.values to get the all keys and values. Next, adding few key value pairs to the map. First create the HashMap object with HashMap() constructor. Kotlin Program to Convert List (ArrayList) to Array and Vice-Versa In this program, you'll learn to convert a list to an array using toArray () and array to list using asList () in Kotlin. This approach is the simple one and easy. Converting HashMap to List in Kotlin Using ArrayList Constructor Map implementations such as HashMap or TreeMap can be converted into an ArrayList or List object.ĭifferent ways to do this conversion. file.In this tutorial, We will learn how to convert the Map to List in kotlin programming. Kotlins’ Collections implements interface List of Java. List strings new ArrayList Regex Backslash Quick and Easy Solution. Public inline fun Iterable.filter(predicate: (T) -> Boolean): List How to explain the fact that ArrayList of Java is equal to List of Kotlin? val list: = () In Kotlin, all strings are objects of the String class. * Returns a list containing only elements matching the given. For instance, if you open _Collections.kt file from stdlib you can find many methods similar to this: /** Kotlin has a feature called Extension Functions which enables Kotlin Standard Library (stdlib) to extend functionality of JDK’s classes. This article focuses on some features of llections package. Kotlin’s Collections are based on Java Collection Framework. Let’s look how to use collections in Kotlin together, it will be exciting! This topic is relevant for versed developers that have serious intentions to come to grips with Kotlin and to be in the forefront of the trends, of course. If you missed this topic by some reason, we strongly recommend to take a look at this survey. Developing android app with Kotlin is gaining popularity among the Java developers.