In which cases is it better to use the 'sequence' data structure?

The data structure 'sequence' is best used when working with a set of elements that need to be traversed once, for example, during iteration or lazy data processing. A sequence allows processing elements one by one without loading the entire set into memory at once, which is useful when working with large or potentially infinite data streams.

For example, in Kotlin, a sequence (Sequence) is used for lazy operations on collections:

val numbers = sequenceOf(1, 2, 3, 4, 5)
val doubled = numbers.map { it * 2 }
doubled.forEach { println(it) }

Here, the map and forEach operations are performed lazily, saving resources when dealing with large amounts of data.