Class ArrayHelper

Static groupByMap

• groupByMap<ElementType, KeyType>(collection: readonly ElementType[], iteratee: ((_: ElementType) => KeyType)): Map<KeyType, ElementType[]>

• Type Parameters

  • ElementType

  • KeyType

  Parameters

  • collection: readonly ElementType[]

  • iteratee: ((_: ElementType) => KeyType)

    • • (_: ElementType): KeyType

      • Parameters

        • _: ElementType

        Returns KeyType

  Returns Map<KeyType, ElementType[]>