Unused loop index

Reports for loops iterating over a collection using the withIndex() function and not using the index variable.

Use the "Remove indices in 'for' loop" quick-fix to clean up the code.

Examples:

  fun foo(bar: List<String>) {
     for ((index : Int, value: String) in bar.withIndex()) { // <== 'index' is unused
         println(value)
     }
  }

After the quick-fix is applied:

  fun foo(bar: List<String>) {
      for (value: String in bar) { // <== '.withIndex()' and 'index' are removed
          println(value)
      }
  }

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.

RemoveForLoopIndices

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 | Redundant constructs

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