| 1 | /**
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| 2 | * A specialized version of `_.reduce` for arrays without support for
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| 3 | * iteratee shorthands.
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| 4 | *
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| 5 | * @private
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| 6 | * @param {Array} [array] The array to iterate over.
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| 7 | * @param {Function} iteratee The function invoked per iteration.
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| 8 | * @param {*} [accumulator] The initial value.
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| 9 | * @param {boolean} [initAccum] Specify using the first element of `array` as
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| 10 | * the initial value.
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| 11 | * @returns {*} Returns the accumulated value.
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| 12 | */
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| 13 | function arrayReduce(array, iteratee, accumulator, initAccum) {
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| 14 | var index = -1,
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| 15 | length = array == null ? 0 : array.length;
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| 16 |
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| 17 | if (initAccum && length) {
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| 18 | accumulator = array[++index];
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| 19 | }
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| 20 | while (++index < length) {
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| 21 | accumulator = iteratee(accumulator, array[index], index, array);
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| 22 | }
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| 23 | return accumulator;
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| 24 | }
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| 25 |
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| 26 | module.exports = arrayReduce;
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