some more of eloquent datastructures

eloquentjavascript/data_structures.js

@@ -113,4 +113,22 @@ function phi(table) {
         (table[1] + table[3]) *
         (table[0] + table[2]));
 };
-// console.log(phi([76, 9, 4, 1]));
+function journalEvents(journal){
+  let events = [];
+  for (let entry of journal){
+    for (let event of entry.events){
+      if (!events.includes(event)){
+        events.push(event);
+      }
+    }
+  }
+  return events;
+}
+console.log(journalEvents(JOURNAL));
+
+for (let event of journalEvents(JOURNAL)){
+  let correlation = phi(tableFor(event, JOURNAL));
+  if (correlation > 0.1 || correlation < -0.1){
+    console.log(event + ":", correlation)
+  } 
+}