Web Reference: Jul 20, 2025 · It calls a provided callbackFn function once for each element in an array and constructs a new array from the results. Read the iterative methods section for more information about how these methods work in general. Description map() creates a new iterator from calling a function for every iterator element. map() does not execute the function for empty elements. map() does not change the original iterator. Jul 23, 2025 · The Map.values () method returns a new Iterator object that contains the values for each element in the Map object in insertion order. You can use a for...of loop to iterate over these values.
YouTube Excerpt: 00:00:00 introduciton 00:00:16 example 1 00:02:13 example 2 00:03:58 example 3 // .
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