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<!DOCTYPE html> <html> <body> <p>将数组中的每个元素乘以 10：</p> <p id="demo"></p> <script> var numbers = [65, 44, 12, 4]; var newarray = numbers.map(myFunction) function myFunction(num) { return num * 10; } document.getElementById("demo").innerHTML = newarray; </script> </body> </html>