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Task/Generator-Exponential/Sidef/generator-exponential.sidef

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+func gen_pow(m) {
+    var e = 0;
+    func { e++ ** m };
+}
+
+func gen_filter(g1, g2) {
+    var v2 = g2.run;
+    func {
+        loop {
+            var v1 = g1.run;
+            while (v1 > v2) { v2 = g2.run };
+            v1 == v2 || return v1;
+        }
+    }
+}
+
+# Create generators.
+var squares = gen_pow(2);
+var cubes = gen_pow(3);
+var squares_without_cubes = gen_filter(squares, cubes);
+
+# Drop 20 values.
+20.times { squares_without_cubes() };
+
+# Print 10 values.
+var answer = [];
+10.times { answer.append(squares_without_cubes()) };
+say answer;