25 lines
600 B
JavaScript
25 lines
600 B
JavaScript
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/**
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* The base implementation of `_.sum` and `_.sumBy` without support for
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* iteratee shorthands.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {number} Returns the sum.
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*/
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function baseSum(array, iteratee) {
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var result,
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index = -1,
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length = array.length;
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while (++index < length) {
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var current = iteratee(array[index]);
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if (current !== undefined) {
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result = result === undefined ? current : (result + current);
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}
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}
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return result;
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}
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module.exports = baseSum;
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