| 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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