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[6] add hash func find, insert and hash_func

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IvanBud123 2026-03-03 22:01:59 +03:00
parent 0e84534109
commit e868e94fcd
1 changed files with 29 additions and 44 deletions
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73
BudakovIS/docs/LinkedListPhoneBook.py
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@ -120,55 +120,40 @@ print("====== END ======")
# 2.hash tables SIZE = 5
SIZE = 1000
buckets = [None] * SIZE 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): def ht_insert(buckets, name, phone):
idx = hash_func(name) index = hash_function(name, len(buckets))
buckets[idx] = ll_insert(buckets[idx], name, phone) head = buckets[index]
return buckets 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): def ht_find(buckets, name):
idx = hash_func(name) index = hash_function(name, len(buckets))
return ll_find(buckets[idx], name) 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))