[1] add hash tabel

meosyam/docs/data/1/phonebook.py

@@ -46,14 +46,45 @@ def ll_list_all(head):
     res.sort(key=lambda x: x[0])
     return res
 
+SIZE = 5
+
+def hash_func(name):
+    s = 0
+    for ch in name:
+        s += ord(ch)
+    return s % 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_rec = []
+    for head in buckets:
+        cur = head
+        while cur:
+            all_rec.append((cur['name'], cur['phone']))
+            cur = cur['next']
+    all_rec.sort(key=lambda x: x[0])
+    return all_rec
 
 if __name__ == '__main__':
-    head = None
-    head = ll_insert(head, 'Pasha', '123-456')
-    head = ll_insert(head, 'Andrey', '789-012')
-    head = ll_insert(head, 'Alisa', '345-678')
-    head = ll_insert(head, 'Anna', '111-222')
-    print("All:", ll_list_all(head))
-    print("Find Pasha:", ll_find(head, 'Pasha'))
-    head = ll_delete(head, 'Andrey')
-    print("After delete Andrey:", ll_list_all(head))
+    buckets = [None] * SIZE
+    ht_insert(buckets, '1', '123-456')
+    ht_insert(buckets, '2', '789-012')
+    ht_insert(buckets, '3', '345-678')
+    ht_insert(buckets, '4', '111-222')
+    print("HT all:", ht_list_all(buckets))
+    print("HT find 1:", ht_find(buckets, '1'))
+    ht_delete(buckets, '2')
+    print("HT after delete 2:", ht_list_all(buckets))