The HashMap class in Kotlin is part of the kotlin.collections package. It provides an efficient way to store key-value pairs, allowing for fast retrieval, insertion, and deletion of elements. This class offers a variety of functions to manage and manipulate the entries in the map.
This guide covers various functions available in the Kotlin HashMap class. Each function is described in simple terms to help beginners understand how to use them. These functions enable you to perform operations such as adding, removing, and querying entries in the map.
Kotlin HashMap Functions
The table below contains various functions of the Kotlin HashMap class, each with a link to a detailed explanation, examples, and real-world uses. Click on the method names to learn more about how to use them effectively in your applications.
| Method | Description |
|---|---|
| Kotlin HashMap clear Function | Removes all of the mappings from this map. |
| Kotlin HashMap containsKey Function | Returns true if this map contains a mapping for the specified key. |
| Kotlin HashMap containsValue Function | Returns true if this map maps one or more keys to the specified value. |
| Kotlin HashMap get Function | Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key. |
| Kotlin HashMap isEmpty Function | Returns true if this map contains no key-value mappings. |
| Kotlin HashMap put Function | Associates the specified value with the specified key in this map. |
| Kotlin HashMap putAll Function | Copies all of the mappings from the specified map to this map. |
| Kotlin HashMap remove Function | Removes the mapping for a key from this map if it is present. |
Kotlin HashSet Functions
- Kotlin HashSet add Function
- Kotlin HashSet addAll Function
- Kotlin HashSet clear Function
- Kotlin HashSet contains Function
- Kotlin HashSet remove Function
- Kotlin HashSet removeAll Function
The Kotlin HashMap class provides a set of functions that allow you to manipulate key-value pairs effectively. Using these functions, you can perform operations like checking for the presence of keys or values, retrieving and removing entries, and clearing the map. These operations are fundamental for managing collections of data efficiently in Kotlin.
For more detailed information, please refer to the official Kotlin HashMap Documentation.