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JavaScript's Array Reduce: Mutable vs. Immutable Accumulators

JavaScript's Array Reduce: Mutable vs. Immutable Accumulators

July 11, 2023 • 6 min read

JavaScript's reduce array method can be incredibly useful in data transformations and building data structures, while at the same time iterating through an existing data structure. It is great for building arrays, objects, strings, or keeping an integer count.