Inspectopedia Help

Can be replaced with lambda

Reports a function reference expression that can be replaced with a function literal (lambda).

Sometimes, passing a lambda looks more straightforward and more consistent with the rest of the code. Also, the fix might be handy if you need to replace a simple call with something more complex.

Example:

fun Int.isEven() = this % 2 == 0 fun example() { val numbers = listOf(1, 2, 4, 7, 9, 10) val evenNumbers = numbers.filter(Int::isEven) }

After the quick-fix is applied:

fun Int.isEven() = this % 2 == 0 fun example() { val numbers = listOf(1, 2, 4, 7, 9, 10) val evenNumbers = numbers.filter { it.isEven() } }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

ConvertReferenceToLambda
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Kotlin | Style issues

Availability

By default bundled with

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin

Kotlin, 241.18072-IJ

Last modified: 18 June 2024