Introduction to Array.reduce
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reduce() is the most flexible array method. It folds an array into a single value: a sum, a product, a built-up object, anything you can express as 'start with X, combine with each item'.
reduce() is the most flexible array method. It folds an array into a single value: a sum, a product, a built-up object, anything you can express as 'start with X, combine with each item'.