Redundant argument-based 'let' call

Reports a redundant argument-based let call.

let is redundant when the lambda parameter is only used as a qualifier in a call expression.

If you need to give a name to the qualifying expression, declare a local variable.

Example:

  fun splitNumbers() {
      "1,2,3".let { it.split(',') }
  }

The quick-fix removes the extra let() call:

  fun example() {
      "1,2,3".split(',')
  }

Alternative:

  fun splitNumbers() {
      val numbers = "1,2,3"
      numbers.split(',')
  }

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.

ComplexRedundantLet

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

Last modified: 18 June 2024