BudakovIS/docs/LinkedListPhoneBook.py

@@ -117,3 +117,58 @@ print("====== TESTING ll_list_all FUNC ======")
 print(ll_list_all(head))
 
 print("====== END ======")
+
+
+
+# 2.hash tables
+
+
+SIZE = 1000
+buckets = [None] * SIZE
+
+def hash_func(name):
+    return hash(name) % SIZE
+
+def ht_insert(buckets, name, phone):
+    idx = hash_func(name)
+    buckets[idx] = ll_insert(buckets[idx], name, phone)
+    return buckets
+
+def ht_find(buckets, name):
+    idx = hash_func(name)
+    return ll_find(buckets[idx], name)
+
+
+def ht_delete(buckets, name):
+    idx = hash_func(name)
+    buckets[idx] = ll_delete(buckets[idx], name)
+    return buckets
+
+def ht_list_all(buckets):
+    all_records = []
+    for head in buckets:
+        current = head
+        while current is not None:
+            all_records.append((current['name'], current['phone']))
+            current = current['next']
+    all_records.sort(key=lambda pair: pair[0])
+    return all_records
+
+
+
+print("---- TESTING BUCKETS ----")
+
+buckets = ht_insert(buckets, 'Alice', '111-111')
+buckets = ht_insert(buckets, 'Bob', '222-222')
+buckets = ht_insert(buckets, 'Charlie', '333-333')
+buckets = ht_insert(buckets, 'Alice', '999-999')
+
+print(ht_find(buckets, 'Bob')) 
+
+print(ht_find(buckets, 'David'))
+
+buckets = ht_delete(buckets, 'Bob')
+
+print(ht_find(buckets, 'Bob'))
+
+print(ht_list_all(buckets)) 

BudakovIS/docs/hash.py

@@ -1,3 +0,0 @@
-SIZE = 1000
-buckets = [None] * SIZE
-