Questions tagged [c++11]
Code that is written to the 2011 version of the C++ standard, sometimes known by its pre-publication name of "C++0x". Use in conjunction with the 'c++' tag.
1,719
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A matrix-vector multiply parallelized using boost::MPI
This program performs a matrix-vector multiply using MPI to split the computation up. It is not extremely robust (for example, it doesn't handle the case where the number of MPI processes does not ...
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1
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Qt Number Generator v2
Link to the old question.
I tried to learn some new things from the answers and here's what I did:
Used Qt Designer so that in Config.h, all member variables and ...
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1
answer
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C++ shared_ptr memory pool
I put together this little memory pool class to help avoid the costs associated with heap allocation and deallocation of objects that are frequently created & destroyed. It creates C++ standard <...
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2
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Simple device (fancy) pointer implementation
device_raw_ptr is a simple fancy pointer. It essentially wrap pointers to GPU memory. It's sole purpose is to separate out host pointers from device pointers, i.e. ...
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1
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Implementing a queue: questions and clarification
Im trying to teach myself some computer science (and c++). I am relatively new to this (and to code review).
I have attempted to implement a queue. I have copied the code below for reference.
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1
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Cache with limited size; If full remove the oldest
Here is a class that stores a single value into the limited cache. If cache is full, it will remove the oldest element to make a space for a new value.
I'm using 2 structures to accomplish this ...
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3
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Modeling an IPv4 Address
I've recently picked up a book that gives various "modern" C++ challenges/solutions. One of the first ones I did was on modeling an IPv4 address in C++. Below is the full implementation; it's also on ...
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Creating a lock-free memory pool using C++11 features
I have created a thread-safe and lock-free memory pool program using C++11 features. A couple of notable features:
g_memStack is a stack that contains the memory ...
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1
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Effective message dispatching [closed]
I have some code, that works fine. However, I know there is a lot of code duplication and C-style programming. In the code example there only is a ...
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2
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3k
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Replace unicode character in the string
A function which replaces an unicode character in a string:
...
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1
answer
2k
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Google Kickstart Round A 2019 - Training
Problem: Training
As the football coach at your local school, you have been tasked with
picking a team of exactly P students to represent your school. There
are N students for you to pick ...
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2
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Finding all intervals that match predicate in vector
I have a function find_all_intervals_below that iterates through a vector and finds all the index intervals of at least a given length where each element within the ...
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443
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Reverse int within the 32-bit signed integer range
Problem
Reverse digits of a 32-bit signed integer. When the reversed integer overflows return 0. Optimized code here.
Feedback
I'm looking for any ways I can optimize this with modern C++ ...
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157
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Passing uint64_t from C++ to R: Hilbert Mapping - xy2d function
I have been working with Rcpp to perform a forward and backward Hilbert Mapping. Below is an implementation based on this code.
My application is in genomics and I may be dealing with enormous ...
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3
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814
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Stack Interview Code methods made from class Node and Smart Pointers
Mainly looking for feedback on my use of smart pointers to implement a standard stack. For interview level production code I have also include a namespace and asserts to test my class, let me know if ...
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Quad Tree Implementation in C++11
The following source code is working Quad Tree Implementation in C++11.
How can I simplify the source code but also allow the user to bring his own Point Class Implementation?
...
user151056
5
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1
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wrapper for common subset of auto_ptr and unique_ptr API
I read an interesting old question on the Software Engineering SE about how to transition away from std::auto_ptr. So I wrote a wrapper around the common subset of <...
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1
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530
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std::vector free list
I'm trying to implement a free list by using a std::vector as its growable buffer. The reason I made this instead of just adding/removing elements directly into a ...
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3
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173
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Program that outputs binary values of input
I am looking to simplify my main() function. The nested if statements contain four lines of the same code, and I'm unsure of how to refactor and simplify it. I was attempting to use booleans, which ...
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1
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56
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Queue Interview Code basic methods made from struct Node optimized
Using feedback from my previous implementation I'm writing a very simple Queue of struct Nodes with only these methods get_front(), get_back(), pop_front(), push_back(), and a ostream friend method. I ...
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6
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1
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723
views
std::string like compile-time const char* string
I want to write a very simple std::string like compile-time const char* string.
I need to work with strings in the compiletime, just like with strings, I implemented basic functions.
...
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1
answer
213
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Finding index in list in C++
I need to find correct index in a array by comparing ranges. Here is my first try:
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2
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shared_ptr basic implementation for non array types
This is an implementation to simulate the basic functionality of c++ shared_ptr.
This doesn't provide features like custom deleter and make_shared().
I would really appreciate any feedback to improve ...
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3
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150
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Linked List Interview Code methods, runtime, and edge cases refactored
In my previous post I had a number of steps given to me from the accepted answer on how I can write more production ready code. In this post I want this code to be reviewed as near production code I'd ...
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Queue Interview Code basic methods made from struct Node
Thanks for all the feedback, I optimized the code here.
Here I'm Writing a very simple Queue of struct Nodes with only these methods get_front(), ...
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1
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594
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Linked List Interview Code methods, runtime, and edge cases
Refactored code here
I want to write a very simple Linked List with only 3 methods Append, Remove and Print. This is not for production and is to be treated as code that could be used in an interview ...
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Vector-transposing function
I profiled a library I'm writing that uses vector transposes and found that I am spending a good bit of time doing the following transpose. I am using a std::vector ...
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2
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565
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Binary Search Tree implementation with unique pointers
I have implemented a binary search tree using templates and unique_ptr in C++ 11. At present, only insertion and deletion are implemented. Please provide your feedback for improvements.
...
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3
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Implementing a binary tree in C++ using "std::unique_ptr"
I have implemented a simple binary search tree class in C++ using std::unique_ptr objects to hold the pointers to each node. In doing this I have come across a ...
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3
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1
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473
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C++ String class implementation
I wrote a simple String class implementation using unique_ptr and move semantics. Is my implementation good enough in terms of design and efficiency?
Stringy.h
<...
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2
answers
334
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Inserting an object pointer to a two-level map
I'm working on requirement that involves creating a N x N table of blocks, with each block having a weight.
Consider the following classes
Block - The fundamental ...
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2
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0
answers
16
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QVSquareLayout implementation for Qt that makes all internal items to be squared
qsquarelayout.h
...
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4
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1
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408
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Adaptive Merge Sort in C++
As the title says, I'm trying to implement a merge sort algorithm in C++ that's also adaptive. This is a personal exercise, and I don't have any specific application in mind. My main goal is to ...
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1
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399
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Calculating array size in C++
This code shows two ways to calculate size of array of any type. I would like to know, which should be preferred? Is there any advantage/disadvantage?
...
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7
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2
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578
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Rearrage sequence so that adjacent numbers add to perfect squares
Consider the array:
original_array1[17] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17}
I want to sort it in such a way that:
Sum of adjacent numbers should be a ...
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2
answers
233
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Program to take a number from 0 to 9 as input
I'm trying to make a function that requests a number from 0 to 9 to the user and that is robust. I've been looking at code to guide me and most fail to find any of these situations, usually due to the ...
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Binary Search Tree implementation using smart pointers
I have implemented below code for binary search tree implementation using shared pointer. At present, I have considered only integers. It supports insertion and deletion of values. Also, a print ...
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3
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378
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Password generator class and CLI
I made a password generator class in C++. I am not as familiar with C++ as I am with C, so I am looking for ways to move to a C++ mindset.
I am also trying to use embedded practices like avoiding ...
0
votes
2
answers
76
views
Find whether two (or 'n') particular values are present in a binary tree
I have a solution to find if two values are present in a binary tree (not a BST).
I would like to know if there is
a more efficient way to do this?
a more elegant way to this?
specific improvement ...
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4
votes
1
answer
269
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Symbolic algebra using a generic smart pointer class
I am trying to implement a minimal symbolic algebra library (AKA C.A.S.) in C++ that allows me to utilize delayed evaluation similar to this question from SO.
My class hierarchy is getting a little ...
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0
answers
299
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Thread-safe sensor interface with observer and strategy patterns
I have a thread-safe API for an observable Sensor. The concrete type of the Sensor is chosen in the ...
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1
answer
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A header only class for C++ time measurement
I wrote a header only class (actually there is a second one for data bookkeeping and dumping) to measure the execution time of a C++ scope without worrying too much about boilerplates. The idea being ...
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2
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300
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Given a string S and a set of words D, find the longest word in D that is a subsequence of S
I'm trying to improve my code and algorithm to find out the longest word from a dictionary occurring as the sub-sequence in the given string.
Example : For example, given the input of S = "abppplee"...
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2
votes
1
answer
83
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Loop over whole array starting from any index
I recently had to repeatedly iterate over an array but increment the index to start from each time. Since this is quite cumbersome in comparison to a normal for loop I made a small template function ...
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1
answer
444
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unique_ptr basic implementation for single objects
This is an implementation to simulate the basic functionality of unique_ptr.
This doesn't provide features like custom deleter and ...
- 229
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2
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4k
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C++ Maybe<T> implementation
In order to improve my understanding of C++ template meta-programming, SFINAE, references, and overall class design, I've tried to implement a Maybe<T> class ...
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C++11 Vector with move semantics
I am practicing move semantics and placement new by writing a custom Vector class but I am not confident that I use them right.
I would really appreciate some pieces of advice regarding my code.
Here ...
user188494
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3
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Making vector push-front improved to O(1) / 8192
After working on it, my regenerating reserve vector may not be so bad after all. (In this stackoverflow question, I presented a vector with a regenerating reserve, faster at ...
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2
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604
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Dijkstra - shortest Path implementation - STL
I have implemented Dijkstra algorithm to perform Shortest Path problem.
Input:
Adjacency List(Directed Graph): Description is like that
{Source Node, {edge_1, .. , edge_N}}
Cost Matrix (Same format as ...
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1
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1k
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LRU Cache in C++11
This is a simple and robust LRUCache implementation using doubly linked list and unordered map. It supports .get(), .put(), and <...
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