'associate' can be replaced with 'associateBy' or 'associateWith'

Reports calls to associate() and associateTo() that can be replaced with associateBy() or associateWith().

Both functions accept a transformer function applied to elements of a given sequence or collection (as a receiver). The pairs are then used to build the resulting Map.

Given the transformer refers to it, the associate[To]() call can be replaced with more performant associateBy() or associateWith().

Examples:

fun getKey(i: Int) = 1L
fun getValue(i: Int) = 1L

fun test() {
    arrayOf(1).associate { getKey(it) to it }  // replaceable 'associate()'
    listOf(1).associate { it to getValue(it) } // replaceable 'associate()'
}

After the quick-fix is applied:

fun getKey(i: Int) = 1L
fun getValue(i: Int) = 1L

fun test() {
    arrayOf(1).associateBy { getKey(it) }
    listOf(1).associateWith { getValue(it) }
}

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Kotlin, @snapshot@

Last modified: 13 July 2023