Web Reference: Jul 20, 2025 · The following example first uses filter() to extract the positive values and then uses map() to create a new array where each element is the average of its neighbors and itself. Description map() creates a new array from calling a function for every array element. map() does not execute the function for empty elements. map() does not change the original array. This tutorial shows you how to use the JavaScript Array map () method to transform elements in an array based on a provided function.
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