Edit equals() method in localcourse comparators

src/main/java/seedu/address/logic/commands/LocalCourseSortCommand.java

@@ -63,7 +63,7 @@ public boolean equals(Object other) {
         }
 
         LocalCourseSortCommand otherLocalCourseSortCommand = (LocalCourseSortCommand) other;
-        return comparator.toString().equals(otherLocalCourseSortCommand.comparator.toString());
+        return comparator.equals(otherLocalCourseSortCommand.comparator);
     }
 
     @Override

src/main/java/seedu/address/logic/parser/LocalCourseSortCommandParser.java

@@ -18,7 +18,7 @@
  */
 public class LocalCourseSortCommandParser implements Parser<LocalCourseSortCommand> {
     /**
-     * Pqrses the given {@code String} of arguments in the context of the LocalCourseSortCommand
+     * Parses the given {@code String} of arguments in the context of the LocalCourseSortCommand
      * and returns a LocalCourseSortCommand object for execution.
      *
      * @throws ParseException if the user input does not conform the expected format.

src/main/java/seedu/address/model/SeplendidModelManager.java

@@ -86,7 +86,7 @@ public SeplendidModelManager(ReadOnlyLocalCourseCatalogue localCourseCatalogue,
     }
 
     /**
-     * Contructs Seplendid Model Manager.
+     * Constructs Seplendid Model Manager.
      */
     public SeplendidModelManager() {
         this(new LocalCourseCatalogue(), new UserPrefs(), new PartnerCourseCatalogue(), new UniversityCatalogue(),

src/main/java/seedu/address/model/localcourse/comparator/LocalCourseComparatorByLocalCode.java

@@ -25,4 +25,19 @@ public int compare(LocalCourse localCourse, LocalCourse otherLocalCourse) {
     public String toString() {
         return "localcode";
     }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other == this) {
+            return true;
+        }
+
+        if (!(other instanceof LocalCourseComparatorByLocalCode)) {
+            return false;
+        }
+
+        LocalCourseComparatorByLocalCode otherLocalCourseComparatorByLocalCode =
+                (LocalCourseComparatorByLocalCode) other;
+        return this.toString().equals(otherLocalCourseComparatorByLocalCode.toString());
+    }
 }

src/main/java/seedu/address/model/localcourse/comparator/LocalCourseComparatorByLocalName.java

@@ -21,4 +21,19 @@ public int compare(LocalCourse localCourse, LocalCourse otherLocalCourse) {
     public String toString() {
         return "localname";
     }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other == this) {
+            return true;
+        }
+
+        if (!(other instanceof LocalCourseComparatorByLocalName)) {
+            return false;
+        }
+
+        LocalCourseComparatorByLocalName otherLocalCourseComparatorByLocalName =
+                (LocalCourseComparatorByLocalName) other;
+        return this.toString().equals(otherLocalCourseComparatorByLocalName.toString());
+    }
 }