Questions tagged [sorting]

Sorting is the process of applying some order to a collection of items.

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2answers
51 views

Sort array of dates

I have this array with dates. All the dates are checked before creating the array with preg_match and check_dates. GoodDates ( ...
4
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1answer
140 views

recursive bin packing

For the company I work for we spec lengths of tube of varying lengths. For a given project let's say there is a list like this 100', 115', 105', 205', 195', 240', 240', 130', 180', 140', 225', 85' ...
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1answer
110 views

Array member set its own index in the array

I'm writing a code where a class member, if != -1, set its own position at array. If the value is == -1, the next free index (whose range is 0 too array's length) is used. In this review, I'm more ...
2
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2answers
103 views

Sort three numbers

So, I wrote this function to sort three numbers in Julia. Any feedback on readability, performance, and Julian-ness would be appreciated. ...
9
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2answers
221 views

Fuzzy list sorting with a heuristic approach to generate a schedule for COVID-19 tests in a hospital

I recently came across a problem scheduling Coronavirus testing at a hospital; the testing capacity needed to be allocated to: High risk wards (combining many factors). Ones which hadn't been tested ...
4
votes
1answer
507 views

Sorting function from a React app to display JSON data in a sortable table

I created this simple react application for a coding challenge, which is described in the linked README file. Basically, I created the components and helper logic to display dynamic JSON data in a ...
2
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2answers
59 views

Using JavaScript, given a JSON value, recursively find all JSON objects, then sort keys in-place

Some background: JavaScript is not my primary language, so I'm looking to get some constructive criticism here. I built a tiny single page HTML app that pretty prints JSON text. It's very useful when ...
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0answers
40 views

GUIComparer with MVVM dialog to allow user input in ArrayList sorting algorithm

download Bit of an esoteric title, but let me explain. I wanted to create an IComparer that can be supplied to a sorting algorithm, which rather than using the ...
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0answers
12 views

Bayesian ranking of fanfics with python and sqlite

I've done a script to sort fanfics by the bayesian average of views and rating. I've used views because it took much longer to scrape the dlp website for reviews. I leave all the code so that it works....
6
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1answer
1k views

friend locator app

I was rejected after a tech screening for the following code. I mainly struggled to make the code 'production ready'. I was running out of time so I did not create a class for testing. How could I ...
6
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5answers
3k views

Takes in two sorted lists and outputs a sorted list that is their union

Write a function that takes in two sorted lists and outputs a sorted list that is their union Could anyone help me to improve this code and make it more user-friendly? We are not supposed to use ...
1
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1answer
90 views

C++ vector bubble sort in my edition

I made a small adaptive function that sorts vector: ...
2
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0answers
66 views

In place dynamic array sorting without using extra memory

I seek critique on a sorting implementation for a dynamic array data-structure. Design decisions Uses the quicksort algorithm. Uses an optimized XOR swap for swapping the elements. XOR swap doesn't ...
8
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1answer
2k views

Organizing and visually duplicating images

This algorithm is supposed to organize and visually duplicate images. I compare 2 images at a time; 1 is the first index image of the directory and another for comparing every other image in the ...
3
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0answers
69 views

I recently wrote sort of structs in golang

I am a bit concerned about style (functions, variable names, spacings, etc.). I am also not sure about whether I should return error or panic. What do you think? ...
3
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3answers
39k views

Minimum number of swaps required to sort the array in ascending order

Here is my problem statement. An excerpt: You are given an unordered array consisting of consecutive integers ∈ [1, 2, 3, ..., n] without any duplicates. You are ...
1
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1answer
41 views

I have a query like this that seems complicated and I want to do it by using Java Stream Api

I have method that fetches sorted and filtered data from Mysql Database, Firstly I had done It by using Java. Now I did it by Mysql but I don't like the way the code looks I have entity that named ...
2
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2answers
59 views

Trying for an efficient and readable heap-sort implementation

I'm looking for any sort of optimization and/or conventional practice tips, such as using the appropriate data types and naming my variables appropriately. ...
3
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3answers
67 views

Trying for an efficient and readable merge-sort implementation

My first implementation of merge sort in C++. I'm looking for any sort of optimization and/or conventional practice tips, such as using the appropriate data types and naming my variables appropriately....
3
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3answers
61 views

PHP Sort Associative Array first by relativity of value then by other value desc

I am trying to sort an associative array by following this scheme: Sort by 'qt': positives first, non-positives after. Magnitude does not matter, only sign. In positive part: sort by sa DESC In ...
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1answer
70 views

Bubble sort optimization

This bubble sort code is very slow compared to the original. ...
3
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2answers
152 views

Sorting an array of positive integers including 0 much faster than Radix Sort

I was working on an Limit Order Book structure in JS and came up with this algorithm. I am pretty sure this must have already been implemented but couldn't even find a clue over the web. The thing is, ...
2
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0answers
72 views

How to make this algorithm faster. Calculates and searches through large arrays

Ive got this algoritm thats "complex". The comments in code give examples of how large the various data types could be. My cpu usage is less than 10% when running this and ram usage is good. ...
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2answers
72 views

Is my Insertion Sort optimal?

I'm learning sorting algorithms and wrote my own implementation of Insertion Sort. Is it optimal? Is there anything that can be done better? ...
2
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1answer
66 views

Generating a performance report for clans in Clash Royale

The following code generates a report showing performance of clan members in a game called Clash Royale. Everything is pretty self-explanatory, we are working with a lot of https requests, arrays and ...
2
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1answer
87 views

C++ Incredibly Precise Sorter | Efficiency and speed of sorting algorithms

Hey Guys, I'm in the process of building a console program in C ++ that allows users to: sort a sequence of numbers loaded from a TXT file save sorted sequence in a new TXT file measure the sorting ...
2
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1answer
151 views

My implementation of bubble sort using Python

I just started studying algorithms and since I'm most familiar with Python decided to use it to actually put the algorithms I've been learning to use. How is my implementation of Bubble Sort? Does it ...
11
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6answers
3k views

Mergesort Criticism in C

I have written a merge sort in C and would like any advice on how to improve it. Any advice helps to make the code better! ...
2
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2answers
197 views

Recursive function for bubble sort

I often see nested loops as a solution to the bubble sort, but my solution involves a recursive function. Is the following solution less efficient than the traditional method? ...
1
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1answer
53 views

Insertion Sort- inserting from the left

I've implemented my own insertion sort algorithm, and here's the code. ...
3
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0answers
46 views

Breadth First Search Block Puzzle

I am creating a program that will be given a text file as output with the board's dimension and the piece id along with the piece width and length. The goal is to arrange all blocks in the board ...
5
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5answers
508 views

Recursive partition sort is inefficient

I have written a recursive method for a partition sort that sorts the array. However, when I use an array of more than 10-20 elements the program takes a really long time to complete. (On my computer ...
2
votes
2answers
88 views

Sorting alphabetically ascending and descending using .sort()

I have created this basic use case of .sort() for my own reference. I am asking for a review to see if there are bad practices present or areas that could be ...
3
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0answers
75 views

Quicksort using Lomuto partition scheme in C

This is my implementation of the divide-and-conquer Quicksort algorithm using the Lomuto partition scheme in C. This is part of a personal project and I'm following Linus Torvalds's coding style. <...
4
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2answers
53 views

Radix Sort Speed

I have implemented a radix sort algorithm in Python 3. It first finds the maximum number of digits in the list, then changes them to strings and adds 0's. For example, [7, 23, 107, 1, 53] to ['007', '...
2
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1answer
59 views

Covid-19 World Case Report Beta 0.1

I am a self-learned programmer and this is my first program. I would really appreciate any critique on my approach. The program should automatically download the who data file to the folder these ...
1
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2answers
76 views

QuickSort Algorithm (Python)

This is my implementation of Quick Sort Algorithm : ...
9
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3answers
546 views

Quicksort with Insertion Sort and Improved Pivot Selection

Here's a Quicksort I had fun writing and improving, so I thought I'd post it here. In my (brief) testing it's about 15% to 20% faster than Java's Arrays.sort(). ...
5
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1answer
115 views

Quicksort Algorithm Speed

I have made a sorting algorithm in Python 3. This sorting algorithm is a modified optimized median of 3 quicksort, with network sorting for lists of size up to 16 and for finding the median. I have ...
0
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3answers
206 views

sorting vector of pair in efficient way

I'm trying to solve the sorting problem but I always get TLE(Time Limit Exceeded/ 1s) so... can you guys suggest a more efficient way to solve this problem? (i can't link the exercise because it is on ...
13
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3answers
2k views

Count word frequencies, and print them most-frequent first

I'm writing a comparison of a simple word-counting program in various languages. The task is to count the frequencies of unique, space-separated words in the input, and output the results most ...
0
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1answer
56 views

C.Insertion sort with guard

I have already addressed this issue and corrected something .really..now the graph looks different Please tell me if the program works correctly?You can see the results in the picture above.I will be ...
1
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2answers
13k views

Elegant way to sort on multiple properties that might be undefined

I'm trying to sort an array with JavaScript. The objects should be sorted based on several properties (about 4 in my real scenario), which are all strings that may also be null or undefined. A null or ...
2
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0answers
30 views

Sort items so that parents are created before their children

I've been asked to create some code to help automate the loading of data into a system based on employee data in a spreadsheet. However, the data isn't clean, so some people may have no manager, some ...
2
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3answers
70 views

Read and sort an array of integers

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1
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1answer
142 views

MSD Quick Radix Sort in Place in C++, Object/Pointer Oriented

Memory: O(log2(max)*2)~O(1) Speed: O(log2(max)*n)~O(n) so i did before a MSD Radix Sort in place but i wanted to do one, with out the count, So i join together the quick sort and radix sort. Think as ...
3
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1answer
66 views

Programming Pearls -- Column 1: Sorting unique numbers with bitfield

I've implemented a simple program to sort an input of unique numbers given as decimals on a separate line. The idea is, since all numbers are unique, to use a (long) bitfield where a 1 on index n ...
0
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1answer
25 views

Calculating ordered differences between elements in vector

Input I start with a vector of integers or floats, e.g.: [10, 100, 20, 5, 50] Output I want to return a list of differences or "deltas" between elements ...
3
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1answer
89 views

benchmarking sorting algorithms: std::sort vs my naive radix

I'm comparing performance of two sorting algorithms applied to sort integers using google benchmark. I'm quite surprised by the results so wanted to ask if you see some mistakes in the way I measure ...

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