all tests passing

hash_practice/exercises.py

@@ -5,15 +5,54 @@ def grouped_anagrams(strings):
         Time Complexity: ?
         Space Complexity: ?
     """
-    pass
+    anagrams = {}
+    for string in strings:
+        sorted_string = sorted(string)
+        joined_string = ''.join(sorted_string)
+        if joined_string in anagrams:
+            anagrams[joined_string].append(string)
+        else:
+            anagrams[joined_string] = [string]
+    anagram_list = []
+    for key in anagrams.keys():
+        anagram_list.append(anagrams[key])
+    return anagram_list
 
 def top_k_frequent_elements(nums, k):
     """ This method will return the k most common elements
         In the case of a tie it will select the first occuring element.
         Time Complexity: ?
         Space Complexity: ?
     """
-    pass
+    nums_dict = {}
+    for i in range(len(nums)):
+        if nums[i] in nums_dict:
+            nums_dict[nums[i]] += 1
+        else:
+            nums_dict[nums[i]] = 1
+
+    frequency_dict={}    
+    max_value = 0
+    for key, value in nums_dict.items():
+        if frequency_dict.get(value):
+            frequency_dict[value].append(key)
+        else:
+            frequency_dict[value] = [key]
+
+        if value > max_value:
+            max_value = value
+    final_list = []
+    for i in range(k):
+        frequency_nums = frequency_dict.get(max_value - i)
+        if frequency_nums:
+            check_next = 0
+            for num in frequency_nums:
+                if check_next + i < k:
+                    final_list.append(num)
+                else:
+                    break
+                check_next += 1
+    return final_list
 
 
 def valid_sudoku(table):