Function counting

  • counting<T, TId>(list, identity): Record<TId, number>

  • Type Parameters

    • T
    • TId extends string | number | symbol

    Parameters

    • list: readonly T[]
    • identity: ((item) => TId)
        • (item): TId

        • Parameters

          • item: T

          Returns TId

    Returns Record<TId, number>

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