Function sumBy

  • This method is like sum except that it accepts iteratee which is invoked for each element in array to generate the value to be summed. The iteratee is invoked with one argument: (value).

    Parameters

    • array: any

      The array to iterate over.

    • iteratee: any

      The iteratee invoked per element.

    Returns number

    Returns the sum.

    Since

    5.6.0

    Example

    const objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }]

    sumBy(objects, ({ n }) => n)
    // => 20