Aho-Corasick pattern matching

[egberts]

Detailed description

How about an Aho-Corasick algorithm?

Context

It is about O(1) searching.

Possible implementation

No response

Additional information

aho-corasick - https://en.m.wikipedia.org/wiki/Aho%E2%80%93Corasick_algorithm

[realstealthninja]

will you be implementing this?

[Saket009]

can you please assign this issue to me ? and mark file location

[Krishna-rudraksh70]

Hi, I'm new to Hacktoberfest and I'm looking for a good first issue to contribute to. I noticed an issue in your repository regarding the "Aho-Corasick algorithm," which I've studied during my DSA course. I would like to request the opportunity to work on this issue.

I want to assure you that I will implement it in a time complexity of O(String_Size + Pattern_Size), if I'm unable to achieve this in O(1).

[aniketkuma-r]

hi, I wanna contribute to this repository. can you please assign this issue to me ?

[Monachaudhary]

I would like to work on this issue. Kindly assign it to me

[aniketmdinde]

Can you please assign this issue to me. I can successfully complete it.

[sarvo123]

hii , hoping you are doing well . i am an enthusiast of data structure and algorithm . it's always fascinating the implementation and working of any algorithm . i have a good command on dsa and i solved a lot of questions of dsa . so "I'm interested in working on this Aho-Corasick algorithm issue. Is it possible to assign it to me, or could you guide me on how to get started?"

[muffinboy19]

can you please assgin this issue to me . I can complete it

[Taruns123]

Hi , I haved worked with Aho-Corasick algo and other pattern matching algorithms and would like to contribute to this issue. I am new to the world of open source contribution but have a decent knowledge of algorithms since I have been doing competitive programming since years. You may take a look at my coding profiles listed on my page. And I would be glad to contribute to this community of algorithms.

[codetechie-abhay]

Aho-Corasick Algorithm in C++

Introduction

The Aho-Corasick algorithm is a string matching algorithm used for efficiently searching for multiple keywords in a given text. It operates with a time complexity of O(n + m + z), making it a powerful tool for text processing and pattern matching tasks.

This repository contains a C++ implementation of the Aho-Corasick algorithm.

Features

• Efficient string searching for multiple keywords.
• Aho-Corasick algorithm implementation in C++.
• Easy-to-use interface for adding keywords and searching for matches.

Aho-Corasick Algorithm in C++ - Algorithm Explanation

The Aho-Corasick algorithm efficiently searches for multiple keywords in a given text. Here's a step-by-step explanation of how the algorithm works, along with how it's implemented in the provided C++ code:

Algorithm Explanation

1. Keyword Addition:

   • Keywords, such as "apple," "banana," and "cherry," are added to a keyword trie data structure.

2. Failure Link Construction:

   • The algorithm constructs failure links between nodes in the keyword trie to efficiently navigate to the next potential match if a mismatch occurs while searching.

   • For each node, the algorithm determines the next node to visit in case of a mismatch by following the failure link, which ensures that no potential match is missed.

3. Text Searching:

   • During text searching, the algorithm processes each character in the input text.

   • It uses the constructed failure links to efficiently traverse the keyword trie while looking for keyword matches.

   • When a keyword match is found, the algorithm increments a counter associated with that keyword.

   • After processing the entire text, the algorithm provides a count of how many times each keyword was found in the text.

Code Implementation - by Abhay Nauityal

1. Keyword Addition:

   • Use the addKeyword method to add keywords to the Aho-Corasick structure.

2. Failure Link Construction:

   • Call the buildFailureLinks method to construct failure links between nodes in the keyword trie.

3. Text Searching:

   • Input text is processed using the search method, which returns a vector with counts of keyword matches.

4. Displaying Results:

   • The code prints out the keywords that were found in the text and the number of times each keyword was found.

please give me this opportunity

[5ku11Cru5h3r]

I would really like to work on this file I have some code written and ready to be implemented. Please assign me the role

[egberts]

Aho-Corasick Algorithm in C++

Introduction

The Aho-Corasick algorithm is a string matching algorithm used for efficiently searching for multiple keywords in a given text. It operates with a time complexity of O(n + m + z), making it a powerful tool for text processing and pattern matching tasks.

This repository contains a C++ implementation of the Aho-Corasick algorithm.

Features

• Efficient string searching for multiple keywords.

• Aho-Corasick algorithm implementation in C++.

• Easy-to-use interface for adding keywords and searching for matches.

Aho-Corasick Algorithm in C++ - Algorithm Explanation

The Aho-Corasick algorithm efficiently searches for multiple keywords in a given text. Here's a step-by-step explanation of how the algorithm works, along with how it's implemented in the provided C++ code:

Algorithm Explanation

1. Keyword Addition:

   • Keywords, such as "apple," "banana," and "cherry," are added to a keyword trie data structure.

2. Failure Link Construction:

   • The algorithm constructs failure links between nodes in the keyword trie to efficiently navigate to the next potential match if a mismatch occurs while searching.

   • For each node, the algorithm determines the next node to visit in case of a mismatch by following the failure link, which ensures that no potential match is missed.

3. Text Searching:

   • During text searching, the algorithm processes each character in the input text.

   • It uses the constructed failure links to efficiently traverse the keyword trie while looking for keyword matches.

   • When a keyword match is found, the algorithm increments a counter associated with that keyword.

   • After processing the entire text, the algorithm provides a count of how many times each keyword was found in the text.

Code Implementation - by Abhay Nauityal

1. Keyword Addition:

   • Use the addKeyword method to add keywords to the Aho-Corasick structure.

2. Failure Link Construction:

   • Call the buildFailureLinks method to construct failure links between nodes in the keyword trie.

3. Text Searching:

   • Input text is processed using the search method, which returns a vector with counts of keyword matches.

4. Displaying Results:

   • The code prints out the keywords that were found in the text and the number of times each keyword was found.

please give me this opportunity

What about dynamically doing addKeyword in-situ?

Callback support at last matched character?

Return string matched?

[arsh-kamal]

hii i can work on this can you assign this to me

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