Kotlin
Useless call on collection type
Warning
New
Last modified: 03 December 2024 Reports filter…
calls from the standard library on already filtered collections.
Several functions from the standard library such as filterNotNull()
or filterIsInstance
have sense only when they are called on receivers that have types distinct from the resulting one. Otherwise, such calls can be omitted as the result will be the same.
Remove redundant call quick-fix can be used to amend the code automatically.
Example:
fun test(list: List<String>) {
val x = list.filterNotNull() // quick-fix simplifies to 'list'
val y = list.filterIsInstance<String>() // quick-fix simplifies to 'list'
}
- 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.
UselessCallOnCollection
Inspection Details | |
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By default bundled with: | |
Can be installed with plugin: | Kotlin, 243.23126-IJ |
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