Questions tagged [comparative-review]
This tag is used for questions which present a problem and multiple solutions, where the asker wishes to know which solution is best (and why).
3
votes
3answers
141 views
Checks user level and limit the data before saving it to mongoDB
I have a function that checks user level and limits the data before saving it to mongoDB database (pre 'save' middleware for mongoose).
It have been getting complexity warnings and tried to rewrite it,...
6
votes
3answers
1k views
malloc in main() or malloc in another function: allocating memory for a struct and its members
When initializing a struct in C, we can allocate memory inside the main function or within another function and return a pointer to the newly created struct. This ...
1
vote
1answer
57 views
Simple MySql or MySqli Class
Which one of these methods is better/safer to use? And what benefits could I get using one or other?
Simple mysqli:
connection.php
...
-1
votes
1answer
27 views
Cleanest functional way to iterate a 2D Grid Co-ordinates in Scala? [closed]
A Solution using nested for loops is trivial.
Here is my code to iterate over a 2D Grid in Scala using map
...
4
votes
1answer
39 views
Comparing 2 iOS and Android versions
Please review and let me know which version is better. I'm just trying to find any caveats or better ways to accomplish the a version comparison independent from Android and iOS.
Formats accepted: '1....
1
vote
1answer
70 views
Given a list and a number k return whether any two numbers from the list add up to k
The task:
Given a list of numbers and a number k, return whether any two numbers
from the list add up to k.
For example, given [10, 15, 3, 7] and k of 17, return true since 10 +
7 is 17.
...
1
vote
1answer
32 views
Clone Vector in rust except at one index [closed]
Let's consider you want to clone all items of a vector orig except the item of index i should be taken from alternative value <...
5
votes
1answer
64 views
Two cross-platform implementations of getline in C
I created my cross-platform implementations of getline function in C.
It takes different arguments and have different return values than 'original' ...
1
vote
0answers
52 views
No performance gain with SIMD 3D vector for ray tracer
I wrote two versions of vector class for my ray tracer. Non-SIMD version and SIMD version. You can find the code below. I want to ask what things should I keep in mind to get max performance with SIMD....
3
votes
0answers
76 views
A Node and a Socket, template or inheritance? [closed]
I'm trying to create a node based scripting/computation system.
I've come up with 2 solution that seems to work. One involves template, the other one inheritance. Basically what I want to achieve is: ...
0
votes
1answer
54 views
Formatting milliseconds as days, hours, minutes, and seconds [closed]
This is a function which aims to convert an amount of milliseconds to a more human-interpretable Day(s) Hour(s) Minute(s) Second(s) format:
...
0
votes
0answers
44 views
Kadane's algorithms to leetcode “121 Best Time to Buy and Sell Stock”
I employed the conventional Kadane's algorithms to solve a maximum subarray problem in leetcode Best Time to Buy and Sell Stock - LeetCode
Best Time to Buy and Sell Stock
Say you have ...
3
votes
1answer
54 views
4 solutions to leetcode 202. Happy Number have almost same performance
I am working on an easy math question Happy number Happy Number - LeetCode
Happy Number
Write an algorithm to determine if a number is "happy".
A happy number is a number defined by ...
3
votes
0answers
23 views
Two solutions to leetcode 127.wordLadder
I am working on Word Ladder - LeetCode
Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such ...
4
votes
1answer
72 views
Time(n) Complexity of Fibonacci Algorithms
It is my first use of classes in Python. I wanted to create something useful and try some new things as I learn this cool language: strategy pattern, testing with nanoseconds precision, curve/poly ...
0
votes
0answers
48 views
Median of three partitioning taking more time than standard quicksort in java
I implemented a standard quicksort and I have a project where I need to improve it. I am trying to make quicksort faster by implementing median of 3 partitioning. I copied codes from trusted ...
1
vote
0answers
34 views
Median of 3 partitioning taking more time than quicksort in java
I have a quicksort code in java which I want to improve. The improved code should take less time than the quicksort code. However when using my improved code which implement median of 3 partitioning, ...
1
vote
0answers
43 views
Rails dynamically changing parts of view but using the same method in controller
I have this update method which decides whether to update or recreate(same as update but resets the approval_status and create_date) of the building_approval object. I have the on_progress? method on ...
5
votes
3answers
85 views
Getting device type from user agent in Python - is explicit better than implicit? [closed]
I'm debating with my colleagues which code is better:
user_agent is a class instance. The class itself comes from a third-party library so we don't have any control ...
2
votes
2answers
80 views
-2
votes
1answer
48 views
Functional vs non functional approach in python [closed]
This is not a task, but I want to know what the general consensus is on functional programming. Particularly functional programming in Python.
The two snippets of code I am comparing are the ...
1
vote
1answer
60 views
1
vote
2answers
90 views
Formatting a price in Swift using an extension vs. a class
I have a price as a Double, which I should format it as a String.
Should I use an extension instead of classical class to ...
6
votes
2answers
141 views
Leetcode 38: The “count-and-say” sequence
38. Count and Say
The count-and-say sequence is the sequence of integers with the first five terms as following:
...
4
votes
1answer
112 views
Object-Oriented Breadth-First Search Implementation
My goal is to write a GUI application where a user can create a maze and select an algorithm. The passage of the algorithm from a selected start and end point should be visualized.
The following ...
1
vote
1answer
45 views
Making EmployeeHistory ViewModel immutable as code analysis suggested
I want to display on a view the EmployeeHistory view model sorted by elements.assignEffDateNext and I want to instantiate and ...
4
votes
3answers
118 views
Uniformly generate a number from 0 to n-1 that isn't on a blacklist
The task:
Given an integer n and a list of integers l, write a function that
randomly generates a number from 0 to n-1 that isn't in l (uniform).
Solution 1:
...
3
votes
0answers
38 views
Export EXIF data from thousands of images to CSV
I have written a script that retrieves specific fields of Exif data from thousands of images in a directory (including subdirectories) and saves the info to a csv file:
...
1
vote
1answer
71 views
Find out whether string A can be shifted to get string B
The task:
Given two strings A and B, return whether or not A can be shifted some
number of times to get B.
For example, if A is abcde and B is cdeab, return true. If A is abc
and B is acb, ...
-3
votes
1answer
56 views
About the problem of seeking matrix inverse
Recently I have solved the inverse matrix in three ways,
found that their work efficiency has obvious differences.
This is the case:
...
3
votes
5answers
531 views
Finding Isogram Word
An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter, however spaces and hyphens are allowed to appear multiple times.
The ...
8
votes
4answers
2k views
Reversing a string - two approaches
Test Case:
Input- "I'm hungry!"
Output- "!yrgnuh m'I"
Approach 1: In this approach, I used a empty string and bind it with the input string reversely.
...
3
votes
0answers
36 views
Basic Qt5 UI with button [closed]
I have the following Qt class:
mainwindow.h
class MainWindow : public QWidget {
Q_OBJECT
QPushButton* m_button;
public:
explicit MainWindow();
};
mainwindow....
1
vote
0answers
39 views
Closest 3Sum in Scala
This question is taken from Leet code.
Given an array nums of n integers and an integer target, find three
integers in nums such that the sum is closest to target. Return the
sum of the three ...
5
votes
1answer
42 views
Mouse control of a camera in an OpenGL program
Introduction
I'm doing an OpenGL program in C. As of now I'm working on the 3D camera system and got the control right. Now I'm working on the mouse control.
It works, but I have used two different ...
2
votes
1answer
105 views
Quiz app with Practice and Exam modes
I am building a Quiz app in swift (my first app) to practice a few skills (using CoreData, working with plists, UIKit etc.) and later to work with a server which stores the Exercises.
Here's my ...
4
votes
1answer
112 views
Bubble sort algorithms and unittest in Python
I am quite new in Python and I am starting my journey with sorting algorithms, PEP8 and the Zen of Python. So far i wrote a post BubbleSort and I drew conclusions and followed the advices. I ...
2
votes
2answers
64 views
Project Euler #10 (sum of primes less than two million) in Clojure
I'm new to Clojure and using some Project Euler problems to familiarize myself with the language's capabilities. Problem #10 asks to find the sum of all primes less than two million.
I wanted to ...
0
votes
1answer
57 views
Binary Reflected Gray Code generation recursively
I tried to write BRGC recursively. I've really recognized that intrinsic of recursion helps for some problems in which I think BRGC is included. is the way I wrote it recursively adequate solution? ...
2
votes
1answer
61 views
Squeezing decorators into functional extensions
When you try to use several decorators it can get ugly pretty quickly and you'll end up with:
...
1
vote
1answer
72 views
Replacing words with their abbreviations - Follow up
This is the follow up for a question you can find here: replacing words with their abbreviations
The goal here is to compare two petential way of answering said question that was:
This particular ...
1
vote
1answer
27 views
Navigation bar React component, with a “back” and a “close” variant
I am working on a component for a navigation bar. This navigation bar currently has two variations: a "back" version, and a "close" version.
I have come up with three different implementations but I ...
-2
votes
1answer
55 views
Build up two linked list, then build up a 3rd link list with nodes of duplicate data from both [closed]
A friend of mines needed some help. He wanted to build up two linked list and then compared them to see if they had the same data values. Finally a 3rd link list would contain the nodes with ...
3
votes
1answer
33 views
Two different styles of testing a custom JSON schema generator
I'm a junior programmer, and I've only been in the industry a couple of months.
One of the aspects that I struggle with most is testing my code. I can write tests, and I can ensure that my code ...
0
votes
1answer
30 views
Implementing carryless multiplication using normal multiplication
In carryless multiplication the partial products are XORed (ie addition without carry) together rather than added normally. The partial products themselves are still the product of a power of two (...
0
votes
1answer
53 views
Five functions to get the digits of a number
I'm writing a simple function: given a number, it will return a sequence or a collection of the digits in the number (in the correct order). i.e ...
2
votes
2answers
107 views
Evaluation of a variation of quick-sort (pivot-selection)
Here is a variation of quick-sort where-in the pivot selection is based on calculating the average of the values of the highest and lowest numbers.
...
3
votes
0answers
69 views
Bridge-Pattern or Entity-Component-System
I want to learn how/when/why to use the GoF Design Patterns. These last days are dedicated to the Bridge Pattern, which means:
Decouple an abstraction from its implementation so that the two can ...
5
votes
1answer
91 views
process data with numpy seems rather slow than pure python?
In my opinion, Vectorization operation with numpy should be much faster than use for in pure python. I write two function to get and process data in a csv file, one in numpy and another in pure python,...
3
votes
2answers
602 views
Word ladders program in Python
Background information: Given two different strings of equal length, the spacing between them is the number of other strings you would need to connect them on a word ladder. Alternately, this is 1 ...
