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public static List map(List list, Function mapping) {
List result = new ArrayList();
for (T elem : list) {
return result;
public static void main (String[] args) {
List inputList =
Arrays.asList("functional", "programming", "with", "closures");
List mappedList = map(inputList, s -> s.length());
System.out.println("Initial List: " + inputList);
System.out.println("Mapped List: " + mappedList);
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