function mean(array) {
      return baseMean(array, identity);
    }
Computes the mean of the values in `array`.

@static
@memberOf _
@since 4.0.0
@category Math
@param {Array} array The array to iterate over.
@returns {number} Returns the mean.
@example

_.mean([4, 2, 8, 6]);
// => 5