Copilot Kotlin: Filter arrays

Copilot Kotlin: Filter Arrays

Filtering arrays is a common operation in Kotlin to create a new list containing only elements that satisfy a given condition. Using Kotlin's built-in filter function, you can write concise and readable code to extract elements based on predicates.

Code

// Define an array of integers
val numbers = arrayOf(1, 2, 3, 4, 5, 6)

// Filter to get only even numbers
val evenNumbers = numbers.filter { it % 2 == 0 }

// Print the filtered list
println(evenNumbers)  // Output: [2, 4, 6]

Key Points

• Kotlin's filter function returns a list containing elements that match the given predicate.
• The predicate is a lambda expression that evaluates each element to a Boolean.
• Filtering does not modify the original array, it creates a new collection.
• You can filter arrays, lists, and other collections in Kotlin using the same filter method.