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31 lines
879 B
31 lines
879 B
var baseIteratee = require('./_baseIteratee'), |
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baseMean = require('./_baseMean'); |
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/** |
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* This method is like `_.mean` except that it accepts `iteratee` which is |
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* invoked for each element in `array` to generate the value to be averaged. |
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* The iteratee is invoked with one argument: (value). |
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* |
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* @static |
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* @memberOf _ |
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* @since 4.7.0 |
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* @category Math |
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* @param {Array} array The array to iterate over. |
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* @param {Function} [iteratee=_.identity] The iteratee invoked per element. |
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* @returns {number} Returns the mean. |
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* @example |
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* |
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* var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }]; |
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* |
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* _.meanBy(objects, function(o) { return o.n; }); |
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* // => 5 |
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* |
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* // The `_.property` iteratee shorthand. |
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* _.meanBy(objects, 'n'); |
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* // => 5 |
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*/ |
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function meanBy(array, iteratee) { |
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return baseMean(array, baseIteratee(iteratee, 2)); |
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} |
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module.exports = meanBy;
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