time-to-botec

Benchmark sampling in different programming languages
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meanBy.js (879B)

      1 var baseIteratee = require('./_baseIteratee'),
      2     baseMean = require('./_baseMean');
      3 
      4 /**
      5  * This method is like `_.mean` except that it accepts `iteratee` which is
      6  * invoked for each element in `array` to generate the value to be averaged.
      7  * The iteratee is invoked with one argument: (value).
      8  *
      9  * @static
     10  * @memberOf _
     11  * @since 4.7.0
     12  * @category Math
     13  * @param {Array} array The array to iterate over.
     14  * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     15  * @returns {number} Returns the mean.
     16  * @example
     17  *
     18  * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
     19  *
     20  * _.meanBy(objects, function(o) { return o.n; });
     21  * // => 5
     22  *
     23  * // The `_.property` iteratee shorthand.
     24  * _.meanBy(objects, 'n');
     25  * // => 5
     26  */
     27 function meanBy(array, iteratee) {
     28   return baseMean(array, baseIteratee(iteratee, 2));
     29 }
     30 
     31 module.exports = meanBy;