'StringBuilder.append(CharArray, offset, len)' call on the JVM

Reports a StringBuilder.append(CharArray, offset, len) function call on the JVM platform that should be replaced with a StringBuilder.appendRange(CharArray, startIndex, endIndex) function call.

The append function behaves differently on the JVM, JS and Native platforms, so using the appendRange function is recommended.

Example:

  fun f(charArray: CharArray, offset: Int, len: Int): String {
      return buildString {
          append(charArray, offset, len)
      }
  }

After the quick-fix is applied:

  fun f(charArray: CharArray, offset: Int, len: Int): String {
      return buildString {
          appendRange(charArray, offset, offset + len)
      }
  }

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.

ReplaceWithStringBuilderAppendRange

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 | Other problems

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