A queue is an ordered, first-in-first-out (FIFO) data structure. Typical implementations of queues support pushing elements to the back and popping them off the front position.

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STL Queue Implementation

I've implemented a simple C++ STL like queue. (I've tried to follow @LokiAstari stack implementation code fashion) ...
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4answers
206 views

LinkedList to be used in a stack or queue

This all works. Just wanted to make sure I didn't miss anything. Coming from C++ and working my way through Algorithms, 4th ed. Here is my LinkedList class: ...
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55 views

Optimizing implementation of Dijkstra

I am using a std::priority_queue to implement Dijkstra's algorithm: ...
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2answers
66 views

Displaying Items in a Circular Queue

I am dealing with the following problem. I have managed to solve it, however, I am not sure if my solution is efficient or the best possible solution. I am always willing to learn from my mistakes. ...
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0answers
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Testing a lock-free job queue

I've created a lock-free job queue and with the tests I've written, which is also very fast. That makes me doubt my benchmark procedure, so I'm hoping the collective knowledge will shed some light on ...
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1answer
68 views

Command line multipart or single file downloader

I am looking for a code review for this multipart or single file chunk downloader using threading and queues. downloader.py ...
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4answers
87 views

Stack implementation using only one queue in C

We start with an empty queue. For the push operation we simply insert the value to be pushed into the queue. The pop operation needs some manipulation. When we need to pop from the stack (simulated ...
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2answers
78 views

Revised Job Queue for Strategy Game

After posting my previous question about this Job Queue, I decided I wasn't actually very happy with it. I am embarrassed to admit that upon further testing it did not function properly in all ...
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2answers
382 views

Generic deque implementation

I implemented a generic deque data structure. Please, review this implementation. Deque.java: ...
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2answers
123 views

Queue over resizable array implementation

I study data structures on coursera's course, and there is an extra exercise to create a Queue data structure. I created it: ...
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3answers
78 views

Threadsafe get method on queue that draws values from other queues?

I have a class that implements Queue and draws values from other queues which may still be referenced outwith it. I want my method to draw values from the contained queues, using synchronized locks on ...
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3answers
108 views

Job Queue for Strategy Game

I've posted a revised version of this here. I posted about this basic problem a while ago, and I got the recommendation to move the code for managing the Jobs of my game to another class. I have ...
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4answers
110 views

Maximum of all subarrays of size k

Given an array and an integer k, find the maximum for each and every contiguous subarray of size k. Examples: Input: ...
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2answers
52 views

Decide the start of the circular gas station path

Suppose there is a circle. There are n petrol pumps on that circle. You are given two sets of data. The amount of petrol that petrol pump will give. Distance from that petrol pump to the ...
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2answers
153 views

Find max-number div by three to be formed by array elements

Given an array of non-negative integers, find the largest multiple of 3 that can be formed from array elements. For example, if the input array is {8, 1, 9}, the output should be "9 8 1", and ...
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2answers
110 views

Implement queue using linkedlist

Implement queue using linkedlist. Looking for code review, optimizations and best practices. ...
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2answers
62 views

Class that implements a queue using two stacks

I am looking for a review of my code that implements a MyQueue class which implements a queue using two stacks. ...
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1answer
324 views

Queued Employees

The following example shows how to implement a queue in an employee structure. I am looking for a review of the implementation: ...
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0answers
60 views

WebApi synchronize database (EF 6) access

I'm working on an ASP.Net MVC 5 /WebApi 2 project. I'm using EF 6 code first for my database access. I've a WebApi action method in which I've to update some data in my database based on the request. ...
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0answers
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Twitter Streaming Client - Round#2

This is round #2. The initial code review is: Twitter Streaming API Client: Identifying the top trending hashtags for a specific term. For a list of changes since the last review please see: ...
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0answers
115 views

Concurrent queue

I recently wrote a concurrent, mutex-less (but not lockfree) queue and wanted to know if it is actually correct, and if there are any particular improvements I could make: ...
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2answers
105 views

Stack implementation using a queue

I've implemented a stack using a queue. Time complexity: \$O(n)\$ - push(), where n is the number of elements in the queue \$O(1)\$ - ...
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5answers
615 views

Circular queue implementation

Implemented simple thread safe circular queue. Looking for code review, optimizations and best practices. ...
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1answer
103 views

Lock-free queue with doubly linked list correctness

I need a lock-free queue which is implemented by doubly linked list. Is my code correct? Are there any errors? Are there any improvements to be made? linkedlist.h ...
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2answers
81 views

Thread-safe queue

I need a thread-safe C++ queue. This is what I have in my project, which is mostly based on code I've found on Stack Overflow. How good is it? Can you make it better? Can you suggest better ...
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2answers
176 views

Worker AI and Job Queue Management for Simulation Game

So I've been working on AI for a Tower Building simulation game for quite a few days, and I think the code would really benefit from review. I'm a hobbyist programmer, but I really care about doing ...
5
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1answer
128 views

Managing People in a SimCity Clone

So I am working through a few different game ideas as I learn programming, and I could definitely use some feedback on my latest project. This is a simple SimCity clone. So far I have created a City ...
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1answer
68 views

Job queue that performs actions

A brief background: I'm working on a game prototype for a simple strategy game. After I created a number of possible jobs I wanted to create something to manage them. This is the first time I've ...
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1answer
252 views

Lockless Queue Multiple-Reader Singler-Writer in C++

I wrote a lockless queue for sending small objects from a single thread to a random worker thread. Assumptions: x86/x86_64 compiled with GCC one thread may Write(), multiple threads may Read() ...
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1answer
167 views

Big-O complexity calculation for a merge and sort function

I have the following code which basically takes a list of sorted integer arrays and merges them together removing the duplicates. I have tried to do the complexity analysis and came to a rough ...
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Tail implementation in C

Write the program tail, which prints the last n lines of its input. By default, n is 10, ...
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Queue with “unlimited” buffer in Go

This is small piece of bigger puzzle, but usable by its own. It an attempt to have a nonblocking queue with "unlimited" (besides memory size) buffer length. Got unit-tests 100% statement coverage, it ...
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1answer
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Thread-safe concurrent FIFO queue in C++

Is this the correct way to implement a thread-safe concurrent FIFO queue in C++? It requires passing unsigned char* arrays of binary data. Thread Safe Concurrent ...
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1answer
145 views

Optimization for add function in queue

I would prefer if more experienced users could give pointers on how I can optimize and think better when writing code. Using Homework Questions as reference, as this is a homework related question. ...
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1answer
719 views

Continuously receive messages async from Azure Service Bus Queues

I'd like to get input on my approach of continuously receiving messages from an Azure Service Bus queue using the async part of the library. My main concern being whether its "safe" to use ...
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2answers
2k views

First-come first-serve job scheduling algorithm

I tried to make the code for implementation of first-come first-serve job scheduling algorithm as used by operating systems. How can I make it better? I am using turbo C++ compiler ...
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1answer
149 views

MemoryCache as a message broker?

I'm in the middle of a project that was built around Microsoft's Message Queue service. During development all of our machines are on a domain and we were able to create a public queue accessible from ...
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Multi producer/consumer queue (without Boost) in C++11

Not lock-free, but still only C++11 and no Boost. It also supports timeouts. ...
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3answers
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Priority Queue in C#

I develop a small game using C# and need A* in it. For that, I need a PriorityQueue, which .NET does not have. I wanted to make my own one for practice. Here is it, please comment on performance and ...
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Very simple priority queue

I wrote this code to handle a fixed number of priority levels. I believe performance will depend on the number of priority levels. Considering only a few levels (3 to 5), is there a more efficient ...
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Queue implementation in C

I was reading about opaque pointers and decided to try it with queues. Please review my code and let me know if there are any errors and how to improve code quality and performance. It uses lines to ...
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4answers
329 views

A more efficient enqueue algorithm in Java

So I have this simple code in Java. It enqueue (adds) and element to the end of the queue (implemented by an ArrayList) without ...
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1answer
55 views

FixedSizePriorityQueue for storing a max number of elements

I implemented the FixedSizePriorityQueue class. The intended purpose is that, you can add as many elements as you want, but it will store only the greatest ...
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1answer
106 views

Can someone review my implementation of a Queue?

So here is my Queue interface: ...
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Implement data structure overflow queue

Implement data structure overflow queue. Overflow queue is a normal queue with one extra property. It never throw Stack overflow exception. So whenever queue becomes full, it replaces the oldest ...
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1answer
420 views

Removing nodes from queue

I had an exercise to create two methods for simple queue class, first to delete last element and second to delete element at k position. Particularly I'm not asking for better implementation. Is it ...
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483 views

Fixed size priority queue

I've tried implementing priority queue with fixed size in Java using TreeSet and overriding add() method: ...
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Javascript Queue for async functions

Based on the answer to my previous question on Stack Overflow, I put together the following Queue class. I realize there are already libraries out there to do this. However, I wanted to actually ...
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2answers
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Thread safe message queue without mutex in C

I'm trying to write a message queue implementation so my threads can exchange data. To keep things simple, the queue is only responsible for sending pointers to memory. Only one thread may send ...
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1answer
303 views

Javascript Queue Object

I created a Queue object when answering this question and I was wondering if it could do with some improvement. Here is the current code: ...