_arrayAggregator.js
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_arrayAggregator.js
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			/**
			* A specialized version of `baseAggregator` for arrays.
			*
			* @private
			* @param {Array} [array] The array to iterate over.
			* @param {Function} setter The function to set `accumulator` values.
			* @param {Function} iteratee The iteratee to transform keys.
			* @param {Object} accumulator The initial aggregated object.
			* @returns {Function} Returns `accumulator`.
			*/
			function arrayAggregator(array, setter, iteratee, accumulator) {
			var index = -1,
			length = array == null ? 0 : array.length;

			while (++index < length) {
			var value = array[index];
			setter(accumulator, value, iteratee(value), array);
			}
			return accumulator;
			}

			module.exports = arrayAggregator;