The Kotlin Array class in the kotlin-stdlib/kotlin package provides a variety of functions to handle arrays. Arrays in Kotlin are used to store multiple values in a single variable, and Kotlin provides many utility functions to manipulate arrays easily and efficiently.
This guide covers various methods available in the Kotlin Array class. Each method is described in simple terms to help beginners understand how to use them. These methods enable you to perform common operations such as creating, modifying, and querying arrays.
Kotlin Array Functions
The table below contains various functions of the Kotlin Array 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 arrayOf | Creates an array of the specified elements. |
| Kotlin emptyArray Function | Returns an empty array. |
| Kotlin Array Function | Creates an array using the specified size and initialization function. |
| Kotlin Array get Function | Returns the element at the specified index. |
| Kotlin Array set Function | Sets the element at the specified index. |
| Kotlin Array size Property | Returns the size of the array. |
| Kotlin Array isEmpty Function | Checks if the array is empty. |
| Kotlin Array isNotEmpty Function | Checks if the array is not empty. |
| Kotlin Array map Function | Returns a list containing the results of applying the given transform function to each element in the array. |
| Kotlin Array filter Function | Returns a list containing only elements matching the given predicate. |
| Kotlin Array forEach Function | Performs the given action on each element. |
| Kotlin Array sorted Function | Returns a list of all elements sorted according to their natural sort order. |
| Kotlin Array sortedBy Function | Returns a list of all elements sorted according to the specified selector function. |
| Kotlin Array sort Function | Sorts the array in-place according to the natural order of its elements. |
| Kotlin Array sortBy Function | Sorts the array in-place according to the specified selector function. |
| Kotlin Array sortDescending Function | Sorts the array in-place in descending order according to the natural order of its elements. |
| Kotlin Array sortByDescending Function | Sorts the array in-place in descending order according to the specified selector function. |
| Kotlin Array reduce Function | Accumulates value starting with the first element and applying operation from left to right to current accumulator value and each element. |
| Kotlin Array fold Function | Accumulates value starting with the initial value and applying operation from left to right to current accumulator value and each element. |
| Kotlin Array reduceIndexed Function | Accumulates value starting with the first element and applying operation from left to right to current accumulator value and each element with its index. |
| Kotlin Array reduceRight Function | Accumulates value starting with the last element and applying operation from right to left to current accumulator value and each element. |
| Kotlin Array foldRight Function | Accumulates value starting with the initial value and applying operation from right to left to current accumulator value and each element. |
| Kotlin Array indexOf Function | Returns the index of the first occurrence of the specified element, or -1 if the array does not contain the element. |
| Kotlin Array lastIndexOf Function | Returns the index of the last occurrence of the specified element, or -1 if the array does not contain the element. |
| Kotlin Array contains Function | Returns true if the array contains the specified element. |
| Kotlin Array find Function | Returns the first element matching the given predicate, or null if no such element was found. |
| Kotlin Array findLast Function | Returns the last element matching the given predicate, or null if no such element was found. |
| Kotlin Array copyOf Function | Returns a new array which is a copy of the original array, resized to the specified new size. |
| Kotlin Array copyOfRange Function | Returns a new array which is a copy of the specified range of the original array. |
| Kotlin Array copyInto Function | Copies elements of the original array into the destination array, starting at the specified destination index. |
| Kotlin Array joinToString Function | Creates a string from all the elements separated using the specified separator and using the given prefix and postfix if supplied. |
| Kotlin Array reverse Function | Reverses elements in the array in-place. |
| Kotlin Array slice Function | Returns a list containing elements at specified indices. |
| Kotlin Array plus Function | Returns an array containing all elements of the original array and then the given elements. |
| Kotlin Array asList Function | Returns a list that wraps the original array. |
| Kotlin Array contentDeepEquals Function | Checks if two arrays are deeply equal. |
| Kotlin Array count Function | Returns the number of elements matching the given predicate. |
| Kotlin Array distinct Function | Returns a list containing only distinct elements from the given array. |
| Kotlin Array first Function | Returns the first element matching the given predicate. |
| Kotlin Array last Function | Returns the last element matching the given predicate. |
| Kotlin Array toList Function | Returns a list containing all elements of the original array. |
| Kotlin Array toSet Function | Returns a set containing all elements of the original array. |
The Kotlin Array class is part of the kotlin-stdlib/kotlin package and provides numerous utility functions to perform common operations on arrays. Whether you need to create, modify, or query arrays, these functions make array manipulation in Kotlin both easy and efficient. For more detailed information, refer to the Kotlin Array Documentation.