To achieve near-instantaneous lookups, we use . This article will guide you through the logic, the algorithms, and a complete C implementation of a dictionary using a Hash Table. How Hashing Works
unsigned long hash_crc(const char *str) unsigned long hash = 0xFFFFFFFF; int c; while ((c = *str++)) hash = (hash >> 8) ^ crc32_table[(hash ^ c) & 0xFF]; c program to implement dictionary using hashing algorithms
unsigned long hash_function(const char *str) unsigned long hash = 5381; int c; while ((c = *str++)) hash = ((hash << 5) + hash) + c; /* hash * 33 + c */ To achieve near-instantaneous lookups, we use
typedef struct Dictionary Entry **buckets; // Array of pointers to linked lists unsigned long size; // Current number of buckets unsigned long count; // Number of key-value pairs stored unsigned long (*hash_func)(const char *); // Function pointer for hash algorithm Dictionary; To achieve near-instantaneous lookups
return NULL; // Key not found