dictionarykotlinnullable
Why mutableMapOf returns nullable?
I wrote a simple code block to store fragments with ids in Map. The value and key of map is initialized as non-nullable but when I want to get them as key and value, it gives nullable type data. So, I don't understand why? Is there any other type of map that returns non-nullable data in Kotlin?
Solution
It is possible that there is no value for key [position], which will make it return null:
abstract operator fun get(key: K): V?Returns the value corresponding to the given key, or null if such a key is not present in the map.
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