|
1
|
var baseSum = require('./_baseSum');
|
|
2
|
|
|
3
|
/** Used as references for various `Number` constants. */
|
|
4
|
var NAN = 0 / 0;
|
|
5
|
|
|
6
|
/**
|
|
7
|
* The base implementation of `_.mean` and `_.meanBy` without support for
|
|
8
|
* iteratee shorthands.
|
|
9
|
*
|
|
10
|
* @private
|
|
11
|
* @param {Array} array The array to iterate over.
|
|
12
|
* @param {Function} iteratee The function invoked per iteration.
|
|
13
|
* @returns {number} Returns the mean.
|
|
14
|
*/
|
|
15
|
function baseMean(array, iteratee) {
|
|
16
|
var length = array == null ? 0 : array.length;
|
|
17
|
return length ? (baseSum(array, iteratee) / length) : NAN;
|
|
18
|
}
|
|
19
|
|
|
20
|
module.exports = baseMean;
|