A hash table is a data structure that implements an associative array abstract data type, a structure that can map keys to values. It uses a hash function to compute an index into an array of buckets or slots, from which the desired value can be found.
Solution Code
Data Structures
class HashTable:
def __init__(self, size=10):
self.size = size
self.table = [[] for _ in range(size)]
def _hash(self, key):
return hash(key) % self.size
def insert(self, key, value):
index = self._hash(key)
bucket = self.table[index]
for i, (k, v) in enumerate(bucket):
if k == key:
bucket[i] = (key, value)
return
bucket.append((key, value))
def get(self, key):
index = self._hash(key)
bucket = self.table[index]
for k, v in bucket:
if k == key:
return v
return None
# Example usage
hash_table = HashTable()
hash_table.insert("key1", "value1")
print(hash_table.get("key1"))Explanation
This code snippet demonstrates how to implement a hash table in Python.Guided Hints
Define a HashTable class
Implement a hash function
Use a list of lists to handle collisions