Mastering Kotlin

Exploring other useful functions

Beyond just functions for manipulating collections, the Kotlin standard library provides many other helpful functions. Let's explore a few examples of how these functions can make our code more concise, readable, and safe.

One such function is isNullOrEmpty(). This provides a convenient way to check whether a collection is either null or empty:

if (list.isNullOrEmpty()) {    // handle empty case}

This helps us to handle those common edge cases with a standard available function.

If we find that a collection is null, but would rather work with an empty collection than a null one, the Kotlin standard library provides functions to retrieve an empty collection of your choosing:

val emptyList = emptyList<String>