Useless call on collection type
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
You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:
//noinspection UselessCallOnCollectionnote
Actual comment syntax will depend on the code language you are working with
More detailed instructions as well as other ways and options that you have can be found in the product documentation:
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By default bundled with: |