1 | var arrayReduceRight = require('./_arrayReduceRight'),
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2 | baseEachRight = require('./_baseEachRight'),
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3 | baseIteratee = require('./_baseIteratee'),
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4 | baseReduce = require('./_baseReduce'),
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5 | isArray = require('./isArray');
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6 |
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7 | /**
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8 | * This method is like `_.reduce` except that it iterates over elements of
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9 | * `collection` from right to left.
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10 | *
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11 | * @static
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12 | * @memberOf _
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13 | * @since 0.1.0
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14 | * @category Collection
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15 | * @param {Array|Object} collection The collection to iterate over.
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16 | * @param {Function} [iteratee=_.identity] The function invoked per iteration.
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17 | * @param {*} [accumulator] The initial value.
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18 | * @returns {*} Returns the accumulated value.
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19 | * @see _.reduce
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20 | * @example
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21 | *
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22 | * var array = [[0, 1], [2, 3], [4, 5]];
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23 | *
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24 | * _.reduceRight(array, function(flattened, other) {
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25 | * return flattened.concat(other);
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26 | * }, []);
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27 | * // => [4, 5, 2, 3, 0, 1]
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28 | */
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29 | function reduceRight(collection, iteratee, accumulator) {
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30 | var func = isArray(collection) ? arrayReduceRight : baseReduce,
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31 | initAccum = arguments.length < 3;
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32 |
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33 | return func(collection, baseIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
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34 | }
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35 |
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36 | module.exports = reduceRight;
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