Tutorial in Ruby in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st Shanethegamer 🇺🇸 0 28 47ms 20 Nov 2024 1st stefangimmillaro 0 28 51ms 20 Nov 2024 1st error256 0 28 46ms 21 Nov 2024 1st GolfingSuccess 🇬🇷 0 28 43ms 25 Nov 2024 1st DialFrost 🇸🇬 0 28 46ms 26 Nov 2024 1st sean-niemann 🇺🇸 0 28 54ms 26 Nov 2024 1st FlyingPenguin223 0 28 50ms 27 Nov 2024 1st emgordon154 0 28 51ms 28 Nov 2024 1st m-tkach 🇺🇦 0 28 45ms 28 Nov 2024 1st sisyphus-ppcg 🇦🇺 0 28 47ms 2 Dec 2024 1st SirBogman 🇺🇸 0 28 44ms 3 Dec 2024 1st Natanaelel 🇸🇪 0 28 50ms 9 Dec 2024 1st MeWhenI 🇻🇦 0 28 52ms 11 Dec 2024 1st antimon2 🇯🇵 0 28 47ms 16 Dec 2024 1st CaedenHarper 🇨🇦 0 28 46ms 4 Jan 2025 1st CLOStrophobic 🇮🇹 0 28 44ms 22 Jan 2025 1st kg583 🇺🇸 0 28 51ms 23 Jan 2025 1st ovs-code 🇩🇪 0 28 47ms 31 Jan 2025 1st pardouin 🇫🇷 0 28 44ms 2 Feb 2025 1st anter69 🇭🇺 0 28 44ms 3 Feb 2025 1st janlelis 0 28 53ms 6 Feb 2025 1st tatzyr 🇯🇵 0 28 49ms 16 Feb 2025 1st chocycat 0 28 53ms 1 Mar 2025 1st paul-c-hartman 0 28 46ms 7 Mar 2025 1st edsrzf 🇳🇿 0 28 50ms 17 Apr 2025 1st HumanoidCPU 0 28 46ms 18 Apr 2025 1st plcc0 0 28 51ms 21 Apr 2025 1st Just4FunCoder 0 28 51ms 18 Jun 2025 1st AbrahamJLR 🇻🇪 0 28 44ms 18 Jul 2025 1st Matter1024 🇮🇳 0 28 56ms 11 Aug 2025 1st vishal-mohanty 0 28 40ms 24 Aug 2025 1st LostSyntax21 🇬🇧 0 28 45ms 11 Sep 2025 1st snoozingnewt 🇨🇦 0 28 50ms 15 Sep 2025 1st Babafaba 0 28 53ms 5 Nov 2025 1st Boowie41 0 28 49ms 10 Nov 2025 1st moozzi 0 28 47ms 26 days ago 1st TheZwierzLF 🇵🇱 0 28 44ms 4 days ago 38th targrik 0 30 48ms 11 Sep 2025 39th artem-aramma 0 31 44ms 18 Jun 2025 40th uncertaain 0 32 49ms 4 Dec 2024 41st yobatm 0 39 53ms 3 Aug 2025 42nd matejmatik123 🇸🇰 0 81 52ms 18 Aug 2025 43rd gigaprofisi 🇺🇸 0 135 52ms 3 Mar 2025 43rd retrohun 0 135 49ms 1 Apr 2025 43rd Bpc-CPU 0 135 48ms 12 Jul 2025 43rd Vexxter9 🇳🇱 0 135 49ms 21 Aug 2025 43rd luuumine 🇫🇷 0 135 45ms 16 Oct 2025 43rd Openstreetmapler 0 135 48ms 30 Oct 2025 1–48 of 48