Size zero check can be replaced with 'isEmpty()'

Reports size == 0 checks on Collections/Array/String that should be replaced with isEmpty().

Using isEmpty() makes your code simpler.

The quick-fix replaces the size check with isEmpty().

Example:

  fun foo() {
      val arrayOf = arrayOf(1, 2, 3)
      arrayOf.size == 0
  }

After the quick-fix is applied:

  fun foo() {
      val arrayOf = arrayOf(1, 2, 3)
      arrayOf.isEmpty()
  }

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.

ReplaceSizeZeroCheckWithIsEmpty

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

Last modified: 18 June 2024