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name : _baseMean.js

 var baseSum = require('./_baseSum');

/** Used as references for various `Number` constants. */
var NAN = 0 / 0;

/**
 * The base implementation of `_.mean` and `_.meanBy` without support for
 * iteratee shorthands.
 *
 * @private
 * @param {Array} array The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {number} Returns the mean.
 */
function baseMean(array, iteratee) {
  var length = array == null ? 0 : array.length;
  return length ? (baseSum(array, iteratee) / length) : NAN;
}

module.exports = baseMean;

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