Improve high scores experience (#502)

Author: ryanplusplus

config.json

@@ -115,14 +115,6 @@
         "prerequisites": [],
         "difficulty": 2
       },
-      {
-        "slug": "high-scores",
-        "name": "High Scores",
-        "uuid": "7a7f05bd-16d1-4103-90c7-f3c8f7a08af0",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 3
-      },
       {
         "slug": "house",
         "name": "House",
@@ -162,6 +154,14 @@
           "searching"
         ]
       },
+      {
+        "slug": "high-scores",
+        "name": "High Scores",
+        "uuid": "7a7f05bd-16d1-4103-90c7-f3c8f7a08af0",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "slug": "darts",
         "name": "Darts",

exercises/practice/high-scores/high-scores.lua

@@ -1,2 +1,23 @@
+local HighScores = {}
+
+function HighScores:scores()
+
+end
+
+function HighScores:latest()
+
+end
+
+function HighScores:personal_best()
+
+end
+
+function HighScores:personal_top_three()
+
+end
+
 return function(scores)
+  local high_scores = {}
+  setmetatable(high_scores, { __index = HighScores })
+  return high_scores
 end