Hash Table Implementation | Data Structures

Introduction

A hash table is a data structure that maps keys to values for efficient lookup. It uses a hash function to compute an index into an array of buckets or slots, from which the desired value can be found. In this challenge, we will implement a hash table with set, get, and remove methods.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL algorithm(("`Algorithm`")) -.-> algorithm/BasicAlgorithmsGroup(["`Basic Algorithms`"]) python(("`Python`")) -.-> python/BasicConceptsGroup(["`Basic Concepts`"]) python(("`Python`")) -.-> python/ControlFlowGroup(["`Control Flow`"]) python(("`Python`")) -.-> python/DataStructuresGroup(["`Data Structures`"]) python(("`Python`")) -.-> python/FunctionsGroup(["`Functions`"]) python(("`Python`")) -.-> python/ObjectOrientedProgrammingGroup(["`Object-Oriented Programming`"]) python(("`Python`")) -.-> python/ErrorandExceptionHandlingGroup(["`Error and Exception Handling`"]) python(("`Python`")) -.-> python/PythonStandardLibraryGroup(["`Python Standard Library`"]) algorithm/BasicAlgorithmsGroup -.-> algorithm/arrays_strings("`Arrays Strings`") python/BasicConceptsGroup -.-> python/variables_data_types("`Variables and Data Types`") python/ControlFlowGroup -.-> python/conditional_statements("`Conditional Statements`") python/ControlFlowGroup -.-> python/for_loops("`For Loops`") python/ControlFlowGroup -.-> python/list_comprehensions("`List Comprehensions`") python/DataStructuresGroup -.-> python/lists("`Lists`") python/DataStructuresGroup -.-> python/tuples("`Tuples`") python/FunctionsGroup -.-> python/function_definition("`Function Definition`") python/ObjectOrientedProgrammingGroup -.-> python/classes_objects("`Classes and Objects`") python/ObjectOrientedProgrammingGroup -.-> python/constructor("`Constructor`") python/ObjectOrientedProgrammingGroup -.-> python/polymorphism("`Polymorphism`") python/ObjectOrientedProgrammingGroup -.-> python/encapsulation("`Encapsulation`") python/ErrorandExceptionHandlingGroup -.-> python/raising_exceptions("`Raising Exceptions`") python/PythonStandardLibraryGroup -.-> python/data_collections("`Data Collections`") python/FunctionsGroup -.-> python/build_in_functions("`Build-in Functions`") subgraph Lab Skills algorithm/arrays_strings -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/variables_data_types -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/conditional_statements -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/for_loops -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/list_comprehensions -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/lists -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/tuples -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/function_definition -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/classes_objects -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/constructor -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/polymorphism -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/encapsulation -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/raising_exceptions -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/data_collections -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} python/build_in_functions -.-> lab-268803{{"`Implement Hash Table with Key-Value Operations`"}} end

Hash Map

Problem

Implement a hash table with set, get, and remove methods. The hash table should use chaining for collision resolution. The keys are integers only. We do not have to worry about load factors or validate inputs. We can assume that the hash table fits in memory.

Requirements

The keys are integers only.
Chaining is used for collision resolution.
Load factors do not need to be considered.
Inputs do not need to be validated.
The hash table fits in memory.

Example Usage

get method:
- If there is no matching key, a KeyError exception is raised.
- If there is a matching key, the corresponding value is returned.
set method:
- If there is no matching key, a new key-value pair is added to the hash table.
- If there is a matching key, the corresponding value is updated.
remove method:
- If there is no matching key, a KeyError exception is raised.
- If there is a matching key, the corresponding key-value pair is removed from the hash table.

Summary

In this challenge, we implemented a hash table with set, get, and remove methods. We used chaining for collision resolution and assumed that the keys are integers only. We did not need to consider load factors or validate inputs. The hash table fits in memory.

Implement Hash Table with Key-Value Operations