Use Cases
Explore the versatility of extension functions for simplifying complex operations, enhancing API interfaces, and streamlining data transformations.
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Simplifying complex operations
The most important use case for extensions is adding methods and properties to APIs that we don’t control. A good example is displaying a toast or hiding a view on Android. Both these operations are unnecessarily complicated, so we like to define extensions to simplify them.
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fun Context.toast(message: String) {Toast.makeText(this, message, Toast.LENGTH_LONG).show()}fun View.hide() {this.visibility = View.GONE}
Enhancing API interfaces
However, there are also cases where we prefer to use extensions instead of members. Consider the Iterable ...