QuickSort is an O(nlogn) efficient sorting algorithm, serving as systematic method for placing elements of an array in order. Quicksort is a comparison sort, meaning that it can sort items of any type for which a “less-than” relation (formally, a total order) is defined. In efficient implementations it is not a stable sort, meaning that the relative order of equal sort items is not preserved. Quicksort can operate in-place on an array, requiring small additional amounts of memory to perform the sorting. It is very similar to selection sort, except that it does not always choose worst-case partition.
Source: https://en.wikipedia.org/wiki/Quicksort
Below are 2 versions of the Quicksort Algorithm Implementation with Python. The first version is easy, but use more memory. The second version use the memory very efficiently.
I- QuickSort Algorithm Implementation with Python (Memory intensive version)

Output:
II- Quicksort Algorithm Implementation with Python (with Memory Optimisation)
III- QuickSort Algorithm Implementation with Python for Both Methods with duration captured
Output
III- Most Efficient Quicksort implementation in Python on array of integer represented as string. Example: array=[“1″,”237373737″,”3″,”1971771717171717″,”0”]
6 31415926535897932384626433832795 1 3 10 3 5
1 3 3 5 10 31415926535897932384626433832795 Just to clarify that lambda
part, in case someone else doesn't understand how exactly string comparison works:'2' > '1'
isTrue
, but'2' > '10'
is alsoTrue
, as well as'2' > '1000'
. That's why the strings are sorted by length first, becauselen('2') < len('10')
. IV- Build up a sorted array, one element at a time. Print the array after each iteration of the insertion sort, i.e., whenever the next element has been inserted at its correct position


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List of Freely available programming books - What is the single most influential book every Programmers should read
- Bjarne Stroustrup - The C++ Programming Language
- Brian W. Kernighan, Rob Pike - The Practice of Programming
- Donald Knuth - The Art of Computer Programming
- Ellen Ullman - Close to the Machine
- Ellis Horowitz - Fundamentals of Computer Algorithms
- Eric Raymond - The Art of Unix Programming
- Gerald M. Weinberg - The Psychology of Computer Programming
- James Gosling - The Java Programming Language
- Joel Spolsky - The Best Software Writing I
- Keith Curtis - After the Software Wars
- Richard M. Stallman - Free Software, Free Society
- Richard P. Gabriel - Patterns of Software
- Richard P. Gabriel - Innovation Happens Elsewhere
- Code Complete (2nd edition) by Steve McConnell
- The Pragmatic Programmer
- Structure and Interpretation of Computer Programs
- The C Programming Language by Kernighan and Ritchie
- Introduction to Algorithms by Cormen, Leiserson, Rivest & Stein
- Design Patterns by the Gang of Four
- Refactoring: Improving the Design of Existing Code
- The Mythical Man Month
- The Art of Computer Programming by Donald Knuth
- Compilers: Principles, Techniques and Tools by Alfred V. Aho, Ravi Sethi and Jeffrey D. Ullman
- Gödel, Escher, Bach by Douglas Hofstadter
- Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin
- Effective C++
- More Effective C++
- CODE by Charles Petzold
- Programming Pearls by Jon Bentley
- Working Effectively with Legacy Code by Michael C. Feathers
- Peopleware by Demarco and Lister
- Coders at Work by Peter Seibel
- Surely You're Joking, Mr. Feynman!
- Effective Java 2nd edition
- Patterns of Enterprise Application Architecture by Martin Fowler
- The Little Schemer
- The Seasoned Schemer
- Why's (Poignant) Guide to Ruby
- The Inmates Are Running The Asylum: Why High Tech Products Drive Us Crazy and How to Restore the Sanity
- The Art of Unix Programming
- Test-Driven Development: By Example by Kent Beck
- Practices of an Agile Developer
- Don't Make Me Think
- Agile Software Development, Principles, Patterns, and Practices by Robert C. Martin
- Domain Driven Designs by Eric Evans
- The Design of Everyday Things by Donald Norman
- Modern C++ Design by Andrei Alexandrescu
- Best Software Writing I by Joel Spolsky
- The Practice of Programming by Kernighan and Pike
- Pragmatic Thinking and Learning: Refactor Your Wetware by Andy Hunt
- Software Estimation: Demystifying the Black Art by Steve McConnel
- The Passionate Programmer (My Job Went To India) by Chad Fowler
- Hackers: Heroes of the Computer Revolution
- Algorithms + Data Structures = Programs
- Writing Solid Code
- JavaScript - The Good Parts
- Getting Real by 37 Signals
- Foundations of Programming by Karl Seguin
- Computer Graphics: Principles and Practice in C (2nd Edition)
- Thinking in Java by Bruce Eckel
- The Elements of Computing Systems
- Refactoring to Patterns by Joshua Kerievsky
- Modern Operating Systems by Andrew S. Tanenbaum
- The Annotated Turing
- Things That Make Us Smart by Donald Norman
- The Timeless Way of Building by Christopher Alexander
- The Deadline: A Novel About Project Management by Tom DeMarco
- The C++ Programming Language (3rd edition) by Stroustrup
- Patterns of Enterprise Application Architecture
- Computer Systems - A Programmer's Perspective
- Agile Principles, Patterns, and Practices in C# by Robert C. Martin
- Growing Object-Oriented Software, Guided by Tests
- Framework Design Guidelines by Brad Abrams
- Object Thinking by Dr. David West
- Advanced Programming in the UNIX Environment by W. Richard Stevens
- Hackers and Painters: Big Ideas from the Computer Age
- The Soul of a New Machine by Tracy Kidder
- CLR via C# by Jeffrey Richter
- The Timeless Way of Building by Christopher Alexander
- Design Patterns in C# by Steve Metsker
- Alice in Wonderland by Lewis Carol
- Zen and the Art of Motorcycle Maintenance by Robert M. Pirsig
- About Face - The Essentials of Interaction Design
- Here Comes Everybody: The Power of Organizing Without Organizations by Clay Shirky
- The Tao of Programming
- Computational Beauty of Nature
- Writing Solid Code by Steve Maguire
- Philip and Alex's Guide to Web Publishing
- Object-Oriented Analysis and Design with Applications by Grady Booch
- Effective Java by Joshua Bloch
- Computability by N. J. Cutland
- Masterminds of Programming
- The Tao Te Ching
- The Productive Programmer
- The Art of Deception by Kevin Mitnick
- The Career Programmer: Guerilla Tactics for an Imperfect World by Christopher Duncan
- Paradigms of Artificial Intelligence Programming: Case studies in Common Lisp
- Masters of Doom
- Pragmatic Unit Testing in C# with NUnit by Andy Hunt and Dave Thomas with Matt Hargett
- How To Solve It by George Polya
- The Alchemist by Paulo Coelho
- Smalltalk-80: The Language and its Implementation
- Writing Secure Code (2nd Edition) by Michael Howard
- Introduction to Functional Programming by Philip Wadler and Richard Bird
- No Bugs! by David Thielen
- Rework by Jason Freid and DHH
- JUnit in Action
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AI Unraveled: Demystifying Frequently Asked Questions on Artificial Intelligence

Top 1000 Canada Quiz and trivia: CANADA CITIZENSHIP TEST- HISTORY - GEOGRAPHY - GOVERNMENT- CULTURE - PEOPLE - LANGUAGES - TRAVEL - WILDLIFE - HOCKEY - TOURISM - SCENERIES - ARTS - DATA VISUALIZATION

Top 1000 Africa Quiz and trivia: HISTORY - GEOGRAPHY - WILDLIFE - CULTURE - PEOPLE - LANGUAGES - TRAVEL - TOURISM - SCENERIES - ARTS - DATA VISUALIZATION

Exploring the Pros and Cons of Visiting All Provinces and Territories in Canada.

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DataIsBeautiful DataIsBeautiful is for visualizations that effectively convey information. Aesthetics are an important part of information visualization, but pretty pictures are not the sole aim of this subreddit.
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submitted by /u/chappynz [link] [comments]
- Iceland earthquakes between 1923 and 2023by /u/lbarqueira on December 3, 2023 at 1:25 am
Data source: @USGS_Quakes Earthquake Hazards Program (EHP). Retrieved from earthquake.usgs.gov/earthquakes submitted by /u/lbarqueira [link] [comments]
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submitted by /u/Lost-Cheesecake2436 [link] [comments]
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submitted by /u/Best-Subject-7253 [link] [comments]
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submitted by /u/styleuno [link] [comments]
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submitted by /u/Autistic-Inquisitive [link] [comments]
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submitted by /u/battleofthehalamo [link] [comments]
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submitted by /u/OverflowDs [link] [comments]
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submitted by /u/-Montse- [link] [comments]
- [Topic][Open] Open Discussion Thread — Anybody can post a general visualization question or start a fresh discussion!by /u/AutoModerator on December 1, 2023 at 1:00 pm
Anybody can post a question related to data visualization or discussion in the monthly topical threads. Meta questions are fine too, but if you want a more direct line to the mods, click here If you have a general question you need answered, or a discussion you'd like to start, feel free to make a top-level comment. Beginners are encouraged to ask basic questions, so please be patient responding to people who might not know as much as yourself. To view all Open Discussion threads, click here. To view all topical threads, click here. Want to suggest a topic? Click here. submitted by /u/AutoModerator [link] [comments]
Reddit Sports Sports News and Highlights from the NFL, NBA, NHL, MLB, MLS, and leagues around the world.
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submitted by /u/PrincessBananas85 [link] [comments]
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submitted by /u/Oldtimer_2 [link] [comments]
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submitted by /u/Oldtimer_2 [link] [comments]
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- Huskies beat Oregon to win Pac-12 championship, likely securing College Football Playoff spotby /u/BCLetsRide69 on December 2, 2023 at 4:58 am
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- Dead longhorn found at OSU before title gameby /u/apocolypticbosmer on December 1, 2023 at 7:55 pm
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Reddit Science This community is a place to share and discuss new scientific research. Read about the latest advances in astronomy, biology, medicine, physics, social science, and more. Find and submit new publications and popular science coverage of current research.
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- A metagenomic view of novel microbial and metabolic diversity found within the deep terrestrial biosphere at DeMMO: A microbial observatory in South Dakota, USAby /u/Kolderke on December 2, 2023 at 9:03 pm
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- Lifestyle choices that could lower the risk of all cancers. A new study has highlighted 10 lifestyle choices that can reduce the risk of developing certain types of cancer by as much as 30%.by /u/Wagamaga on December 2, 2023 at 4:47 pm
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- Almost half of marine mammals around the UK are being poisoned by banned chemicals. The compounds, once used in pesticides, flame retardants and coolants, are having significant impacts on the health and reproduction of the animals.by /u/Wagamaga on December 2, 2023 at 3:53 pm
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- Response to therapy in Richter syndrome: a meta-analysis of early clinical trialsby /u/rubricito on December 2, 2023 at 2:18 pm
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- Study identifies the greatest threat to wildlife across North America and Canada: people. 40% of animals were sent to rehab centers because of injuries classified under the “human disturbances” categoryby /u/giuliomagnifico on December 2, 2023 at 11:58 am
submitted by /u/giuliomagnifico [link] [comments]
- Spent coffee grounds suitable for biorefinery processes can yield valuable bio-based compounds. This includes applications in bioadhesives, bio-oil, bioplastics, and phenolics.by /u/BrnoRegion on December 2, 2023 at 11:42 am
submitted by /u/BrnoRegion [link] [comments]
- The use of artificial intelligence (AI) during colonoscopy significantly enhanced the detection of colorectal neoplasias (bowel polyps that can turn into cancer), likely by reducing the miss rate, finds meta analysis of 33 randomized clinical trials involving 27,404 patients.by /u/mvea on December 2, 2023 at 10:58 am
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- To help autonomous vehicles make moral decisions, researchers ditch the 'trolley problem', and use more realistic moral challenges in traffic, such as a parent who has to decide whether to violate a traffic signal to get their child to school on time, rather than life-and-death scenarios.by /u/mvea on December 2, 2023 at 10:48 am
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- Despite pressures facing young families, parents take precious moments to play with their babies: 4 in 5 primary caregivers of 9-month-old babies reported cuddling, talking and playing with their little one several times a day, in the first national UK study of babies in over 2 decades, led by UCL.by /u/mvea on December 2, 2023 at 10:40 am
submitted by /u/mvea [link] [comments]
- Multiple Lyme bacteria species found in brain of patient diagnosed with Schizotypal Personality Disorder, 15 years after initial Lyme diagnosis and continuous antibiotic treatment. The patient committed suicide and left a note requesting that his brain be analyzed for the presence of Borrelia.by /u/rathealer on December 2, 2023 at 10:21 am
submitted by /u/rathealer [link] [comments]
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- Electro-Cooling Material Makes Solid-State Fridge Viableby /u/Memetic1 on December 2, 2023 at 2:54 am
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- Study reveals critical antibody features for ~80% enhanced neutralization breadth and 10-fold potency against the HIV-1 fusion peptide. These findings can help accelerate the development of broad vaccines and therapeutics against HIV-1.by /u/Biointron on December 2, 2023 at 1:59 am
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- Extreme heat and drought typical of an end-of-century climate could occur over Europe as soon as 2030 and repeatedlyby /u/Creative_soja on December 1, 2023 at 8:52 pm
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- Researchers have used human tracheal cells to create tiny biological robots that can move on their own and work together to encourage healing in damaged neurons without requiring genetic modifications.by /u/chrisdh79 on December 1, 2023 at 7:55 pm
submitted by /u/chrisdh79 [link] [comments]
Health Health, a science-based community to discuss health news and the coronavirus (COVID-19) pandemic
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- What do we know about China’s respiratory illness surge?by /u/reuters on December 2, 2023 at 12:28 am
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- Nanoplastics linked to Parkinson's and some types of dementia – new studyby /u/wisi_eu on December 1, 2023 at 9:03 pm
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- Long COVID rates appear to be decreasingby /u/scientificamerican on December 1, 2023 at 3:20 pm
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- One identical twin went vegan while the other didn’t. See what happened | CNNby /u/Bean_Tiger on December 1, 2023 at 7:54 am
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- Indeed Scraps Mental Health Days as More Firms Pare Covid-Era Perksby /u/jms1225 on November 30, 2023 at 8:31 pm
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- 'I don't want to die': Shannen Doherty reveals breast cancer has spread to her bonesby /u/boppinmule on November 30, 2023 at 9:39 am
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- How the prescription drug supply chain is killing local pharmaciesby /u/duderos on November 29, 2023 at 8:15 pm
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- Suicide deaths reached a record high in the US in 2022, despite hopeful decreases among children and young adults | CNNby /u/Maxcactus on November 29, 2023 at 4:09 pm
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- New Zealand smoking ban: Health experts criticise new government's shock reversalby /u/Sariel007 on November 29, 2023 at 2:13 pm
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- Omicron variants may cause fewer long COVID cases, study saysby /u/euronews-english on November 29, 2023 at 12:32 pm
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- Walking pace could impact diabetes risk, study findsby /u/goki7 on November 29, 2023 at 12:27 pm
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- China's cancer drug finally approved in the US - but it will cost 30 times more to buyby /u/duderos on November 29, 2023 at 11:23 am
submitted by /u/duderos [link] [comments]
Today I Learned (TIL) You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.
- TIL Ethan Zuckerman, the man who created pop-up ads, has said sorry to the world for inventing one of the most detested forms of online advertising.by /u/Agile_External4387 on December 3, 2023 at 4:50 am
submitted by /u/Agile_External4387 [link] [comments]
- TIL: 42% of Americans believe in ghosts and 18% believe they had a paranormal experience according a 2009 Pew Research. In recent years, there has been a rise in Queer Ghost Hunters across several states looking for queer ghosts to record the ghost's stories.by /u/Flares117 on December 3, 2023 at 4:42 am
submitted by /u/Flares117 [link] [comments]
- TIL Shahtoosh, the most expensive fabric on earth is totally illegal to ownby /u/ladyermine on December 3, 2023 at 4:33 am
submitted by /u/ladyermine [link] [comments]
- TIL - there is a church 100 miles west of Chicago that is shaped like a penisby /u/edfitz83 on December 3, 2023 at 3:26 am
submitted by /u/edfitz83 [link] [comments]
- TIL as part of its foreign policy the Nixon administration actively portrayed the president as an out of control madman to try and convince hostile nations that he was capable of anything at anytime. Including nuclear war. Nixon dubbed this strategy "Madman Theory".by /u/HucklecatDontCare on December 3, 2023 at 2:01 am
submitted by /u/HucklecatDontCare [link] [comments]
- TIL of Steve Leech, a milkman who was doing his rounds when he saw a shop on fire. He used 320 pints of milk to put out the fire, saving 7 other stores. He received the award for "Hero Milkman of the Millennium"by /u/DarkenedAbyssalVoid on December 3, 2023 at 12:56 am
submitted by /u/DarkenedAbyssalVoid [link] [comments]
- TIL in early cinema, actors were not credited in films because producers feared fame might lead to demands for higher wages from stars. In 1910, Florence Lawrence (formerly just "the Biograph Girl") became the first actress to have her name used in advertisements to promote her movies.by /u/Skeleton_Pilots on December 2, 2023 at 11:59 pm
submitted by /u/Skeleton_Pilots [link] [comments]
- TIL all 658 employees at Cantor Fitzgerald who had offices in the World Trade Center were killed representing the single largest loss among any single organization in the attacksby /u/mankls3 on December 2, 2023 at 11:46 pm
submitted by /u/mankls3 [link] [comments]
- TIL The Babushka Lady is an unidentified woman present during the 1963 assassination of JFK, who appeared to be taking photos as other witnesses took cover. Her identity, along with her photos, remain unknown.by /u/moogly2 on December 2, 2023 at 11:42 pm
submitted by /u/moogly2 [link] [comments]
- TIL in 1938, Chiang Kai-Shek caused the deadliest manmade flood in history when he intentionally broke the Yellow River dam. While he did succeed in his goal of slowing down the Japanese advance, it ended up killing 400,000-893,303 people in the process.by /u/Independent_Ad9304 on December 2, 2023 at 9:20 pm
submitted by /u/Independent_Ad9304 [link] [comments]
- TIL General Motors first produced and sold an EV more than 25 years ago. However, the EV1 could only be leased as it was part of a “real world engineering evaluation”.by /u/jasperlady on December 2, 2023 at 8:48 pm
submitted by /u/jasperlady [link] [comments]
- TIL that the head of the UN Office on Drugs and Crime concluded that billions in drug money kept the global financial system afloat during the 2008 crisisby /u/twentyturin on December 2, 2023 at 8:18 pm
submitted by /u/twentyturin [link] [comments]
- TIL: Unknown to Johnny Cash when he recorded it, "Ring of Fire" was written by June Carter about falling in love with him and her torment because she was married to someone else. She sang backup on Cash's version. Years later, when they were both divorced, they met again and eventually married.by /u/zazzlekdazzle on December 2, 2023 at 6:45 pm
submitted by /u/zazzlekdazzle [link] [comments]
- TIL the song Jeremy by Pearl Jam is a real story about Jeremy Wade Delle who committed suicide in front of his class on January 8, 1991. His death wasn't more than a paragraph in local news Eddie Vedder said that he felt "the need to take that small article and to give it more importance."by /u/whowhatwearthat on December 2, 2023 at 5:47 pm
submitted by /u/whowhatwearthat [link] [comments]
- TIL an International Chess Master tried to advance his career in 1951 by playing against 30 Russian school children at the same time. In the end, he drew 10 and lost the other 20, setting the record for worst simultaneous chess playing in the world.by /u/Kiran_Stone on December 2, 2023 at 4:08 pm
submitted by /u/Kiran_Stone [link] [comments]
- TIL that Patrick Troughton, the second actor to play Doctor Who, considered playing the character as a tough sea captain or pirate in blackface. He eventually chose the character of a "space hobo."by /u/sd_glokta on December 2, 2023 at 3:59 pm
submitted by /u/sd_glokta [link] [comments]
- TIL that 38% of the world's cocoa beans to make chocolate is produced in one country - Côte d'Ivoire. Cocoa accounts for 40% of this African nation's income from exportsby /u/Specialist_Check on December 2, 2023 at 3:55 pm
submitted by /u/Specialist_Check [link] [comments]
- TIL in 2009, BlackBerry held 56% of the U.S. smartphone market, Fortune magazine ranked RIM as the fastest growing company, and the BlackBerry Curve was the best-selling smartphone in the U.S.by /u/YUGIOH-KINGOFGAMES on December 2, 2023 at 3:34 pm
submitted by /u/YUGIOH-KINGOFGAMES [link] [comments]
- TIL that during the summer of 2002, Mr. Rogers' chronic stomach pain became severe enough for him to see a doctor about it, and in October 2002, he was diagnosed with stomach cancer. He died four months later on February 27, 2003 at the age of 74.by /u/iiSkilledProgram on December 2, 2023 at 2:47 pm
submitted by /u/iiSkilledProgram [link] [comments]
- TIL in Shanghai every weekend there is a marriage market, parents and grandparents of unmarried adults gather in a park and trade information on their children/grandchildren (height, weight, income, occupation...) with the goal to find them a suitable partner.by /u/DistyOnett on December 2, 2023 at 2:21 pm
submitted by /u/DistyOnett [link] [comments]