Questions tagged [sorting]
Sorting is the process of applying some order to a collection of items.
1,076
questions
1
vote
1answer
36 views
Insertion Sort- inserting from the left
I've implemented my own insertion sort algorithm, and here's the code.
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3
votes
0answers
34 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 ...
2
votes
2answers
65 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
votes
0answers
38 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.
<...
0
votes
1answer
79 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 ...
4
votes
2answers
48 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', '...
5
votes
1answer
103 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
votes
1answer
38 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 ...
0
votes
3answers
77 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
votes
3answers
1k 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 ...
1
vote
0answers
40 views
2
votes
0answers
21 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
votes
3answers
67 views
3
votes
1answer
53 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
votes
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
votes
1answer
78 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 ...
1
vote
1answer
136 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 ...
1
vote
1answer
52 views
Binary Radix Sort implementation on linked list
I am trying to implement binary radix sort in C which sorts a linked list of integers stably. Although my algorithm has a time complexity of O(log2(k).n) (where k ...
0
votes
1answer
103 views
MSD Radix sort in Place in c++, Object/Pointer Oriented
Memory:O(log(max)base(mod)*mod)Speed:O(log(max)base(mod)*n)
I did a radix sort in place to not get a auxliar array. In the process i discorver a few things.
Is imposible to do LSD radix sort in place ...
1
vote
1answer
109 views
Read and sort 100 numbers from a text file
The program itself reads 100 values from a text file named input.txt. Then sorts those values in ascending order and writes the values to a new file called ...
0
votes
1answer
83 views
Big Sorting - Performant Sorting
Consider an array of numeric strings where each string is a positive whole number. Sort the array's string elements in ascending order of their numeric values, and return the sorted array.
Return: ...
0
votes
0answers
12 views
Simple Parallel Sorting
i had made a simple parallel sorting for my personal games. it did well so far, but i would like to get some advises about how to improve it further or perhaps there are an alternative methods for ...
3
votes
2answers
76 views
Sorting a list but the sort order isn't known until runtime
I need to sort a list of strings that I'm reading in but the sorted order of that list is not predetermined (I can't hard code it); I read in the sort order from a source and build a comparator by ...
2
votes
2answers
88 views
Sorting program code
I have done a sorting program, it works but I am new to the coding world and I would love to hear your thoughts.
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4
votes
3answers
331 views
Sorting Nested Array
Recently on SO there was this question
i am trying to get sequence index of each array of array like I have
an element of the array and that 5 arrays have multiple elements and I
want to get the ...
0
votes
0answers
38 views
Sorting Algorithm Visualiser in React with TypeScript
This code animates sorting algorithms in the browser. I've included all the React components I've used and left out the individual sorting algorithm implementations.
SortingVisualiser.tsx
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2
votes
1answer
57 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
vote
0answers
97 views
PowerShell - Sort strings containing numbers numerically
I am a newbie in programming, but I do have potential, I am using PowerShell to hone my skills, I have written a simple function to sort strings consisted of numbers humanly (i.e. in a order like 1 2 ...
4
votes
1answer
130 views
Performant Sort function for big arrays
In sort(arr), I want to sort an array. Children must be beneath their parent. And children of the same parent are sorted using ...
4
votes
0answers
101 views
Sorting Algorithm (from scratch) in Python
Updated (at the bottom)
I am attempting to write a Python program where I have to create a sorting algorithm without the assistance of the built-ins (like the sort()...
1
vote
1answer
50 views
Pandas DataFrame.sort_values() new method to exclude by row name
I was working on new function with Pandas DataFrame. It's meant to sort values by column name but exclude specific rows from sorting and return sorted dataframe with that has rows with preserved ...
-1
votes
2answers
75 views
Remove duplicates from array and save it to another one [duplicate]
I have been tasked to make an array without duplicated values from another existing array.
So I did it, but I want to know is there some other better way to do that.
Example input/output
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3
votes
3answers
136 views
Remove duplicates from array and save it to another one
So I have been tasked to make an array without duplicated values from another existing array.
So I did it, but I want to know is there some other better way to do that.
Example input/output:
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3
votes
1answer
63 views
How do I optimize the bubble sort in Assembly8086?
I tried to implement bubble sort in Assembly 8086.
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5
votes
2answers
104 views
Best way to find the largest sorted suffix in a list - USACO Sleepy Cow Sorting Python
Solving this problem.
Right now, my solution entails finding the largest sorted sublist, starting from the beginning, all the way to the end. However, I feel like the way I wrote the ...
4
votes
1answer
316 views
Hybrid Merge/Insertion sort algorithm
Explanation: Although merge sort runs in Ω(nlgn) and insertion sort runs in Ω(n^2), the constant factors in insertion sort can make it faster in implementation for small problem sizes. This sorting ...
1
vote
2answers
87 views
Sorting string with if-else
I was asked to write a program that sorts three strings alphabetically using only if-else (no sorting algorithms, usage of arrays whatsover). I'm fairly new to C++ programming but I've come up with ...
4
votes
1answer
85 views
Scheduling COVID-19 testing in a hospital using a heuristic
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 ...
14
votes
3answers
2k views
Python3 - merge sort, O(n) space efficiency
Any critique of my implementation of Merge sort would be much appreciated! I tested it using a driver function (shown below), and everything works. However, it still feels unwieldy, I am a beginner ...
3
votes
2answers
481 views
Football management game in C++
Recently, I have been working on a College Football Manager game, in which you coach a team from the ground up. I have successfully made it to where you can win games, lose games, and change your team ...
4
votes
2answers
126 views
Merge/Insertion sort program taking longer than an hour to finish - C++
My program uses merge and insertion sort to sort a set of numbers.
It works perfectly fine for small inputs, less than 2 seconds for 1,000 ints. But I need to sort 1,000,000 ints. When I try with 1 ...
2
votes
1answer
120 views
Interview Coding Test: Transaction Processing: Find Duplicates
I had given a coding test for a job which failed. It had two problems and one of them is shared in this question along with my solution and other I already posted at this link.
Problem: Find duplicate ...
3
votes
1answer
90 views
Mergesort in python
My mergesort implementation currently takes a very long time, for a list with 1 million elements it takes over 130 seconds to get the list sorted.
Could someone kindly have a look at my code and ...
4
votes
3answers
189 views
My insertion sort version
I'd like to know what you think of my insertion sort version. I tried to be pythonic and avoid while loops with "ugly" index-management:
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3
votes
1answer
76 views
Sorts and data structures: a bucket sort
I am currently going through and implementing basic algorithms and data structures as I feel I didn't learn enough about this during my Data Structures and Algorithms unit. So far I've done the ...
3
votes
3answers
730 views
Sorting an array of integers in C++
This is a follow up to my previous post as it contained a lot of errors and wasn't accurate.
I am using the Bubble sort algorithm to sort an array of integers and I would like to know whether I could ...
2
votes
4answers
451 views
Sorting an array in C++ using Bubble sort
Here is my bubble sort algorithm that I would like to improve in any way possible
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3
votes
1answer
93 views
Bubble Sort In C++
I'm learning modern C++ and also algorithms, and am doing some practice by coding up some simple algorithms. Also trying to use templates whenever possible as I'm quite unfamiliar with generic ...
4
votes
2answers
67 views
Move two element of an array to the front - Javascript
I want to move two element of my array to the beginning.
This solution works but I would like to know a better approach since using sort() twice is probably not the best.
Array Input:
...
5
votes
1answer
44 views
Selection Sort Java and Analysis
I have written a selection sort code in java. I know its very elementary algorithm, but since i am learning, so wanted your input about the quality of the code. Please have a look at the code:
package ...
