[6] add hash func find, insert and hash_func

BudakovIS/docs/LinkedListPhoneBook.py

@@ -120,55 +120,40 @@ print("====== END ======")
 
 
 
-# 2.hash tables
-
-
-SIZE = 1000
+SIZE = 5
 buckets = [None] * SIZE
 
-def hash_func(name):
-    return hash(name) % SIZE
+
+
+def hash_function(name, size):
+    return hash(name) % size
+
 
 def ht_insert(buckets, name, phone):
-    idx = hash_func(name)
-    buckets[idx] = ll_insert(buckets[idx], name, phone)
-    return buckets
+    index = hash_function(name, len(buckets))
+    head = buckets[index]
+    new_head = ll_insert(head, name, phone)
+    buckets[index] = new_head
+
+print(f"\n\n\n ====== TEST INSERT HASH ======")
+print(buckets)
+ht_insert(buckets, "Ivan", "123-456")
+print(buckets)
+ht_insert(buckets, "Dima", "789-123")
+print(buckets)
+ht_insert(buckets, "Boris", "456-789")
+print(buckets)
+print("====== END TEST ======\n\n\n")
+
 
 def ht_find(buckets, name):
-    idx = hash_func(name)
-    return ll_find(buckets[idx], name)
+    index = hash_function(name, len(buckets))
+    head = buckets[index]
+    return ll_find(head, name)
 
+print("====== TEST FIND HASH FUN ======")
+print("find by name Ivan: ",ht_find(buckets, "Ivan"))
+print("find by name Dima: ",ht_find(buckets, "Dima"))
+print("find by name Boris: ", ht_find(buckets, "Boris"))
+print("====== END TEST ======")
 
-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))