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The problem isn't with the comments, it's with throwing everything into one big main() method. Why throw away code when with a little bit more work you can give it some real power?
import java.util.ArrayList; import java.util.Comparator; import java.util.List; import perlforjava.control.Looper; import perlforjava.functions.Arrays; import perlforjava.functions.Mapper; import perlforjava.lang.Block; /** * The Schwartzian Transform written in Java. */ public class TheSchwartz { private ArrayList list; /** * Comparator to sort by length. */ public final static Comparator BY_LENGTH; /** * Comparator to sort alphabetically. */ public final static Comparator ALPHABETICALLY; /** * Static initializer */ static { BY_LENGTH = new Comparator() { public int compare(Object a, Object b) { return ((Integer) ((List) a).get(1)).compareTo( ((Integer) ((List) b).get(1))); } }; ALPHABETICALLY = new Comparator() { public int compare(Object a, Object b) { String s1 = a.toString().substring(1); String s2 = b.toString().substring(1); return s1.compareTo(s2); } }; } /** * Simple Constructor. * * @param list */ public TheSchwartz(ArrayList list) { this.list = list; } /** * Workhorse function. Sorting by passed in Comparator * * @return */ public ArrayList sort(Comparator sortBy) { List out = Block() { // pull the first element from each List and return it protected Object process(Object elem) { return ((List) elem).get(0); } }, Arrays.sort( // run the comparison of Integer values to determine o +rder sortBy, // map each string into an ArrayList of string => length Block() { protected Object process(Object elem) { ArrayList temp = new ArrayList(); temp.add(elem); temp.add(new Integer(((String) elem).length())); return temp; } }, list))); return (ArrayList)out; } public static void main(String[] args) { // Create a new List of values to sort ArrayList in = new ArrayList(); in.add("fu"); in.add("duhh"); in.add("birdy"); in.add("sea"); /* Sort based upon length of string by mapping each string to a List where the first element is the string and the second + is its length. Sort on the latter and return a new List of str +ings. */ TheSchwartz merlyn = new TheSchwartz(in); List outByLength = merlyn.sort(TheSchwartz.BY_LENGTH); System.out.println("By Length:"); // Loop over the results to view them Looper.foreach(outByLength, new Block() { protected Object process(Object elem) { System.out.println("ELEM " + elem.toString()); return null; } }); System.out.println("\nAlphabetically:"); List outAlphabetically = merlyn.sort(TheSchwartz.ALPHABETICALL +Y); // Loop over the results to view them Looper.foreach(outAlphabetically, new Block() { protected Object process(Object elem) { System.out.println("ELEM " + elem.toString()); return null; } }); } }
Fun post.

In reply to Re: Re: (OT) The Schwartzian Transform in Java by ignatz
in thread (OT) The Schwartzian Transform in Java by djantzen

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