associate

Signatures

inline fun <T, D : Dimension, K, V> MultiArray<T, D>.associate(
    transform: (T) -> Pair<K, V>
): Map<K, V>

inline fun <T, D : Dimension, K> MultiArray<T, D>.associateBy(
    keySelector: (T) -> K
): Map<K, T>

inline fun <T, D : Dimension, K, V> MultiArray<T, D>.associateBy(
    keySelector: (T) -> K,
    valueTransform: (T) -> V
): Map<K, V>

inline fun <K, D : Dimension, V> MultiArray<K, D>.associateWith(
    valueSelector: (K) -> V
): Map<K, V>

Parameters

Parameter	Type	Description
`transform`	`(T) -> Pair<K, V>`	Produces a key-value pair from each element.
`keySelector`	`(T) -> K`	Extracts the key from each element.
`valueTransform`	`(T) -> V`	Transforms the element into the map value.
`valueSelector`	`(K) -> V`	Produces the value for each element used as key.

Returns: Map<K, V> preserving iteration order. Duplicate keys keep the last value.

Example

val a = mk.ndarray(mk[1, 2, 3])

a.associate { it to it * it }       // {1=1, 2=4, 3=9}
a.associateBy { it * 10 }           // {10=1, 20=2, 30=3}
a.associateWith { it.toString() }   // {1="1", 2="2", 3="3"}

28 February 2026