Move-to-front algorithm: Difference between revisions

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@@ Line 198: / Line 198: @@
 decode(list l)
 {
-    integer c, e, i;
+    integer c, e;
-    text al, s;
+    data al, s;
     al = "abcdefghijklmnopqrstuvwxyz";
-    for (i, e in l) {
+    for (, e in l) {
-        s = insert(s, -1, c = al[e]);
+        s.append(c = al[e]);
-        al = insert(delete(al, e), 0, c);
+        al.delete(e).insert(0, c);
     }
@@ Line 214: / Line 214: @@
 {
     integer c, e;
-    text al;
+    data al;
     list l;
     al = "abcdefghijklmnopqrstuvwxyz";
-    while (c = initial(s)) {
+    for (, c in b_draft(s)) {
-        s = delete(s, 0);
+        l.append(e = al.place(c));
-        l.append(e = place(al, c));
+        al.delete(e).insert(0, c);
-        al = insert(delete(al, e), 0, c);
     }