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JavaScript Iterators 迭代器
tryjs_iterator_map
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<!DOCTYPE html> <html> <body> <h1>JavaScript Iterators</h1> <h2>The map() Method</h2> <p>The map() method returns a new iterator with all elements transformed by a map function.</p> <p id="demo"></p> <script> // Create an iterator const myIterator = Iterator.from("123456789"); // Map the Iterator const mappedIterator = myIterator.map(x => x * 2); // Iterate over all elements let text = ""; for (const x of mappedIterator) { text += x + "<br>"; } document.getElementById("demo").innerHTML = text; </script> </body> </html>