construct a DoubleDict from a Map

core/src/processing/data/DoubleDict.java

@@ -3,6 +3,7 @@ package processing.data;
 import java.io.*;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.Map;
 
 import processing.core.PApplet;
 
@@ -106,6 +107,20 @@ public class DoubleDict {
   }
 
 
+  public DoubleDict(Map<String, Double> incoming) {
+    count = incoming.size();
+    keys = new String[count];
+    values = new double[count];
+    int index = 0;
+    for (Map.Entry<String, Double> e : incoming.entrySet()) {
+      keys[index] = e.getKey();
+      values[index] = e.getValue();
+      indices.put(keys[index], index);
+      index++;
+    }
+  }
+
+
   /**
    * @webref doubledict:method
    * @brief Returns the number of key/value pairs