Source: \meanBy.js
import baseSum from './.internal/baseSum.js'
/** Used as references for various `Number` constants. */
const NAN = 0 / 0
/**
* This method is like `mean` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the value to be averaged.
* The iteratee is invoked with one argument: (value).
*
* @since 4.7.0
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The iteratee invoked per element.
* @returns {number} Returns the mean.
* @example
*
* const objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }]
*
* meanBy(objects, ({ n }) => n)
* // => 5
*/
function meanBy(array, iteratee) {
const length = array == null ? 0 : array.length
return length ? (baseSum(array, iteratee) / length) : NAN
}
export default meanBy