'substring' call should be replaced with 'substringBefore'

Reports calls like s.substring(0, s.indexOf(x)) that can be replaced with s.substringBefore(x).

Using substringBefore() makes your code simpler.

The quick-fix replaces the substring call with substringBefore.

Example:

  fun foo(s: String) {
      s.substring(0, s.indexOf('x'))
  }

After the quick-fix is applied:

  fun foo(s: String) {
      s.substringBefore('x')
  }

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.

ReplaceSubstringWithSubstringBefore

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