Add rumad variation

.gitignore

@@ -15,9 +15,11 @@ pom.xml.asc
 out
 notes
 .clj-kondo/
-.idea/
 .calva/
 .lsp/
+/.idea
+/.idea/
+/results
 
 # Don't commit the data directory that we'll
 # use to hold the data from

.idea/misc.xml

@@ -7,7 +7,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_13" project-jdk-name="13" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_13" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

src/propeller/variation.cljc

@@ -105,9 +105,11 @@
 (defn uniform-deletion
   "Randomly deletes instructions from plushy at some rate."
   [plushy umad-rate]
+  (if (zero? umad-rate)
+    plushy
     (remove (fn [_] (< (rand)
                        (/ 1 (+ 1 (/ 1 umad-rate)))))
-          plushy))
+            plushy)))
 
 (defn diploid-uniform-deletion
   "Randomly deletes instructions from plushy at some rate."
@@ -155,6 +157,16 @@
            (uniform-addition (:instructions argmap) (:umad-rate argmap))
            (uniform-deletion (:umad-rate argmap)))
        ;
+       :rumad
+       (let [parent-genome (:plushy (selection/select-parent pop argmap))
+             after-addition (uniform-addition parent-genome
+                                              (:instructions argmap)
+                                              (:umad-rate argmap))
+             effective-addition-rate (/ (- (count after-addition)
+                                           (count parent-genome))
+                                        (count parent-genome))]
+         (uniform-deletion after-addition effective-addition-rate))
+       ;
        :uniform-addition
        (-> (:plushy (selection/select-parent pop argmap))
            (uniform-addition (:instructions argmap) (:umad-rate argmap)))