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  4. Loop can be replaced with stdlib operations

Loop can be replaced with stdlib operations

Last modified: 03 December 2024

Reports for loops that can be replaced with a sequence of stdlib operations (like map, filter, and so on).

Example:

fun foo(list: List<String>): List<Int> {
  val result = ArrayList<Int>()
  for (s in list) {
     if (s.length > 0)
       result.add(s.hashCode())
     }
  return result
}

After the quick-fix is applied:

fun foo(list: List<String>): List<Int> {
  val result = list
    .filter { it.length > 0 }
    .map { it.hashCode() }
  return result
}

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.

LoopToCallChain
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

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Kotlin, 243.23126-IJ