Questions tagged [circular-list]
A circular list may be implemented using a fixed-size array (a ring buffer) or a linked list.
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Circular Queue in C for an embedded project
I wrote a simple circular queue. (in order to store characters because of the fact, that I am using UART through the DMA and sometimes my printf's override each other)
I am looking for some review, ...
9
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2answers
1k views
Circular FIFO Buffer
I was bored the other day and got to wondering how I would implement a circular FIFO buffer in Rust. My goal was to create an implementation I could use on a bare metal microcontroller. This means no ...
3
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2answers
244 views
Ring Buffer Implementation in C++14
A ring buffer or circular buffer is a fixed sized queue that advances head and tail pointers in a modulo manner rather than moving the data. Ring buffers are often used in embedded computer design.
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2
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1answer
51 views
Find palindromes in circular rotated string
I'm trying to tackle a programming challenge to determine how many palindromes exist in a given string that is being rotated character by character. My solution works, but it's too slow, and I'm ...
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2answers
127 views
Josephus Problem with cyclic iterator
Given the Josephus Problem.
Josephus Problem
N people (numbered 1 to N) are standing in a circle. Person 1 kills Person 2 with a sword and gives it to Person 3. Person 3 kills Person 4 and ...
3
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2answers
117 views
Circular / Cyclic Buffer implementation
I am learning circular / cyclic buffer using this link. Here is the code that I have written so far:
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2answers
77 views
Looping text with directional control
The code is an implementation of looping text (similar to a circular buffer - wraps around when it reaches the edge of the defined bounds) with directional control.
The code is functional and works ...
2
votes
1answer
36 views
Looping text in Python with directional control
The code is an implementation of looping text (similar to a circular buffer - wraps around when it reaches the edge of the defined bounds) with directional control.
The code is functional and works ...
3
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2answers
244 views
Customized lock-free RingBuffer
I have implemented my own lock-free ringbuffer for multiple producers multiple consumers using vector. Can you guys help me review to see if there are any problems and ways to improve?
Explanation:
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4
votes
1answer
83 views
JavaScript circular linked list compatriot game
I found this question in O'Reilly Data Structure and Algorithm in Javascript:
According to legend, the first-century Jewish historian Flavius
Josephus was about to be captured along with a band ...
6
votes
1answer
717 views
Multiple-producer, single-consumer lock-free circular queue
I'm working on a firmware on a bare-metal ARM single core processor (Cortex M4), with no RTOS. I need to add a multiple-producer, single-consumer, lockless fixed-size circular (ring) buffer to the ...
2
votes
2answers
143 views
Find the sum of all digits that match the following digit in a circular list
The challenge
The captcha requires you to review a sequence of digits (your puzzle input) and find the sum of all digits that match the next digit in the list. The list is circular, so the digit ...
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2answers
4k views
Circular Queue Implementation Using Array in java
Here is my code of Array Implementation of Queue in java.
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2answers
998 views
Compare two lists to see if one is a rotation of the other
Going through a list of common interview question, this was the next one. Any suggestions on performance and improvement? What would be a better implementation of this? Also correct me if I'm wrong, ...
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3answers
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Deque implemented using a circular array
I found a tutorial on implementing a deque using a circular array. I changed the implementation but I am not sure if it is correct or not.
So I have one question:
I wrote code that uses an ...
1
vote
0answers
400 views
Really basic ring/circular buffer in Java
I needed a simple way to run tests on the last n bytes of data received from a socket, and a ring buffer seemed to be the most efficient way to handle it. This is a very basic buffer that stores ...
1
vote
1answer
209 views
Split Circular linked list into two halves
I want to improve this code. I want to enter all values in linked list at a time like circular_linked_list<int> cll1(5, 10, 18, 25);
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2
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1answer
742 views
Circular Doubly Linked List
After improving code from suggestions to my previous question.
I have implemented copy constructor, copy assignment, move constructor, move assignmnet. There is a suggestion for sentinal node but I ...
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1answer
3k views
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2answers
192 views
SPOJ Class Leader using circular linked list
I have solved a spoj question CLASS LEADER. For each test case there are n students and a paper will be given to student m and now the game starts, the student m will pass the paper by o positions ...
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4answers
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Advent of Code 2017, Day 1: Sum of digits matching the next digit (circular list)
I haven't used C++ for quite a while and wanted to practice a bit, so I decided to start simple and work through the Advent of Code 2017.
This is my solution to Part 1 of the Day 1 exercise "Inverse ...
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1answer
683 views
C Implementation of dynamic mem allocation using first-fit algo
I have implemented malloc and free in C based on first-fit algo and using a circular linked list for free blocks of memory. It seems to be working based on the basic test in the main function. I would ...
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1answer
66 views
CodeChef Fusing Weapons in a circular list
I am currently trying to solve this problem on Codechef:
Before the start of each stage, N weapons appear on the screen in circular order. Each weapon has an integer associated with it, which ...
3
votes
1answer
2k views
Best way of implementing a circular buffer
I wanted to implement a circular buffer for learning purpose only.
My first option was to use a secondary status for rear and front pointers: (Like the ones I've seen in many websites)
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1
vote
1answer
491 views
Implementation of IPC circular buffer
For a school assignment we had to implement IPC between two processes using File Maps with some specific requirements.
The relevant requirements are:
ComLib will send a null-terminated (C-style) ...
3
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2answers
388 views
Implementation of a Resizing Array Queue
Below is a problem from Sedgewick's Algorithms and my solution. Any thoughts or suggestions for improvement would be much appreciated.
Develop a class that implements the queue abstraction with
a ...
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2answers
346 views
Binary protocol print utility in C++
Please review this protocol printer/decoder in C++.
I also attached a sample binary file to use to test.
Main program:
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4
votes
1answer
605 views
Non blocking single producer/consumer queue with C++11 atomics
I've recently got interested in lockless programming, mainly lockless queues for job repartitions, so here I undertook a challenge of creating lockless queue for single producer and consumer.
This is ...
4
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1answer
2k views
C++ Circular buffer through Circular iterator
I saw some question on SO lately involving circular buffer, like a chain of descriptors for data transfer. All solutions involved lots of lines.
I wanted an implementation with as few lines as ...
4
votes
3answers
457 views
Producer-Consumer with Peterson algorithm in java
Producer-consumer problem in Java with a circular buffer of N positions.
There is a single thread representing the producer that will produce consecutive integer elements
There is a dimensioned ...
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2answers
2k views
Circular Buffer C++ Implementation
I was asked this question in an interview, and didn't go through. I know, it needs some improvements, but probably I am missing something big? I would highly appreciate if someone can review it for me,...
5
votes
3answers
2k views
Elegant Circular Buffer
I would like to design an elegant yet efficient circular buffer of integers.
I have designed a FIFO type circular buffer in C++(11)- starting with the class header (declaration) as follow:
[...
8
votes
1answer
121 views
Rotate a given number of variables in-place
A very simple but useful algorithm: rotate the values of a given number of variables in-place to the left so that the first variable gets the value of the second, the second gets the value of the ...
5
votes
1answer
792 views
Implementation of fixed size queue using a ring (cyclic) buffer
I found myself in need of a fixed size queue and decided to implement one using a ring (cyclic) buffer.
I have tried my best to match the API of std::queue with ...
0
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1answer
1k views
Deleting the head node of a circular linked list
Today I tackled this coding challenge:
Given a circular linked list, implement a method to delete its head node. Return the list's new head node.
I would appreciate any feedback.
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19
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2answers
2k views
A Python wrap-around list
I want to gain experience creating data structures that look and feel like Python builtin types. As a first exercise, I've written a WraparoundList class meant to ...
5
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1answer
699 views
Circular doubly linked list with templates
I tried to write some code namely "Circular doubly linked list" and I would like to use templates to do this.
This is the first time I use templates and throws some exceptions.
I would like to know ...
2
votes
1answer
2k views
Implementing a queue using a circular buffer
I'm working on implementing a queue using a circular buffer problem. Any smarter ideas for better time complexity, any code bug or code style advice are highly appreciated.
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3
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4answers
3k views
Circular array rotation Java
I have a solution to the HackerRank Circular Array Rotation challenge. It passes 7 test cases out of 15. The rest of them are getting timed out. I think it's because of the huge data set that has ...
0
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1answer
242 views
Shift an element in a circular container
I implemented a function to shift an element after another in a logical circular array. Shifting in this case simply means moving element at position i to in front ...
2
votes
1answer
73 views
Invert-range operation in a circular vector
I implemented a invert-range operation in a (logical) circular vector. A circular vector is a vector without a logical starting and ending object, or, equivalently, the successive element of the ...
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1answer
44 views
Delete the node at index i from its current position and insert it after node at index j
I was trying to create a function to delete the node at index i from its current position and insert it after node at index j ...
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2answers
230 views
Rotation view for std::vector
I have this view class for constant time rotations of a std::vector:
...
4
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1answer
414 views
Circular doubly linked list in JavaScript
I've been studying data structures and have taken a stab at implementing a doubly LL in JavaScript. Please review and advise on any additional improvements and optimizations. I'm more interested in ...
4
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2answers
1k views
Circular buffer implementation using linked list
I'm a beginner with C.
The below is the implementation of circular buffer using linked list. Please review my code and suggest any improvements to make it efficient or to improve in coding style.
<...
4
votes
1answer
103 views
Rotating list in python
This is a list class which allows users to "turn" the list while keeping track of the current position.
For efficiency, the list is not actually rotated on each rotation, but instead an offset keeps ...
3
votes
2answers
2k views
constant sized circular (ring) buffer
I've implemented constant sized circular buffer. It provides push and pop operations, along with modern emplace. It is also optimized for destruction of trivially destructible types.
I didn't include ...
6
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5answers
2k views
A buffer that holds and provides the latest n items
I have developed the following code to hold n latest items it has received, and when asked for provide these n latest items.
The interface is:
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9
votes
3answers
25k views
Circular Buffer C++11 Implementation
Here's the implementation of a common data structure I use at work, mainly for logging purposes.
I tried to make it C++11-compliant, but even if this standard has been around for a few years, it is ...
10
votes
2answers
7k views
Circular Buffer Implementation
I'm implementing a "live analytics" feature and I need to always keep track of the last N items that were added to a collection so I figured I'd make a circular buffer since I couldn't find one.
I ...
