Reports:Tasks not implemented in NQP

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Awareness

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Not implemented

These are currently not implemented in NQP. Please implement some if you can. If any tasks are not possible or too complex in NQP, they should not be on this list. To mark a task as such, add {{omit from|NQP}}, preserving the capitalization of the language, to that task. It will appear below under the "Not Considered" section.

1 100 doors 2 24 game 24 game/Solve 9 99 Bottles of Beer 9 billion names of God the integer A A+B Abstract type Accumulator factory Ackermann function Active Directory/Connect Active Directory/Search for a user Active object Add a variable to a class instance at runtime Address of a variable Align columns Anagrams Anagrams/Deranged anagrams Animate a pendulum Animation Anonymous recursion Apply a callback to an array Arbitrary-precision integers (included) Arena storage pool Arithmetic-geometric mean Arithmetic/Complex Arithmetic/Integer Arithmetic/Rational Arithmetic evaluation Array concatenation Arrays Assertions Associative array/Creation Associative array/Iteration Atomic updates Average loop length Averages/Arithmetic mean Averages/Mean angle Averages/Mean time of day Averages/Median Averages/Mode Averages/Pythagorean means Averages/Root mean square Averages/Simple moving average B Balanced brackets Balanced ternary Benford's law Best shuffle Binary digits Binary search Binary strings Bitcoin/address validation Bitmap Bitmap/Bresenham's line algorithm Bitmap/Bézier curves/Cubic Bitmap/Bézier curves/Quadratic Bitmap/Flood fill Bitmap/Histogram Bitmap/Midpoint circle algorithm Bitmap/PPM conversion through a pipe Bitmap/Read a PPM file Bitmap/Read an image through a pipe Bitmap/Write a PPM file Bitwise IO Bitwise operations Boolean values Box the compass Break OO privacy Brownian tree Bulls and cows Bulls and cows/Player C CRC-32 CSV to HTML translation Caesar cipher Calendar Calendar - for "real" programmers Call a foreign-language function Call a function Call a function in a shared library Call an object method Canny edge detector Carmichael 3 strong pseudoprimes Case-sensitivity of identifiers Catalan numbers Catalan numbers/Pascal's triangle Catmull–Clark subdivision surface Character codes Character matching Chat server Check Machin-like formulas Check that file exists Checkpoint synchronization Cholesky decomposition Classes Closest-pair problem Collections Color of a screen pixel Color quantization Colour bars/Display Colour pinstripe/Display Colour pinstripe/Printer Combinations Combinations with repetitions Command-line arguments Comments Compare sorting algorithms' performance Compile-time calculation Compound data type Concurrent computing Conditional structures Conjugate transpose Constrained genericity Constrained random points on a circle Continued fraction Continued fraction/Arithmetic/Construct from rational number Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N) Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2) Conway's Game of Life Copy a string Count in factors Count in octal Count occurrences of a substring Count the coins Create a file Create a file on magnetic tape Create a two-dimensional array at runtime Create an HTML table Create an object at a given address Cut a rectangle D DNS query Date format Date manipulation Day of the week Deal cards for FreeCell Death Star Deconvolution/1D Deconvolution/2D+ Deepcopy Define a primitive data type Delegates Delete a file Detect division by zero Determine if a string is numeric Determine if only one instance is running Digital root Dinesman's multiple-dwelling problem Dining philosophers Discordian date Distributed programming Documentation Dot product Doubly-linked list/Definition Doubly-linked list/Element definition Doubly-linked list/Element insertion Doubly-linked list/Traversal Dragon curve Draw a cuboid Draw a sphere Dutch national flag problem Dynamic variable names E Echo server Element-wise operations Empty directory Empty program Empty string Enforced immutability Entropy Enumerations Environment variables Equilibrium index Ethiopian multiplication Euler method Evaluate binomial coefficients Even or odd Events Evolutionary algorithm Exceptions Exceptions/Catch an exception thrown in a nested call Executable library Execute Brain**** Execute HQ9+ Execute SNUSP Execute a Markov algorithm Execute a system command Exponentiation operator Extend your language Extreme floating point values F Factorial Factors of a Mersenne number Factors of an integer Fast Fourier transform Fibonacci n-step number sequences Fibonacci sequence File IO File modification time File size Filter Find common directory path Find largest left truncatable prime in a given base Find last sunday of each month Find limit of recursion Find the missing permutation First-class functions First-class functions/Use numbers analogously First class environments Five weekends FizzBuzz Flatten a list Flow-control structures Floyd's triangle Forest fire Fork Formal power series Formatted numeric output Forward difference Four bit adder Fractal tree Function composition Function definition Function frequency Function prototype G GUI/Maximum window dimensions GUI component interaction GUI enabling/disabling of controls Galton box animation Gamma function

G cont. Generator/Exponential Generic swap Globally replace text in several files Go Fish Gray code Grayscale image Greatest common divisor Greatest element of a list Greatest subsequential sum Greyscale bars/Display Guess the number Guess the number/With feedback Guess the number/With feedback (player) H HTTP HTTPS HTTPS/Authenticated HTTPS/Client-authenticated Hailstone sequence Hamming numbers Handle a signal Happy numbers Harshad or Niven series Hash from two arrays Haversine formula Hello world/Graphical Hello world/Line printer Hello world/Newline omission Hello world/Standard error Hello world/Text Hello world/Web server Here document Higher-order functions History variables Hofstadter-Conway $10,000 sequence Hofstadter Figure-Figure sequences Hofstadter Q sequence Holidays related to Easter Honeycombs Horizontal sundial calculations Horner's rule for polynomial evaluation Host introspection Hostname Hough transform Huffman coding I I before E except after C Identity matrix Image convolution Image noise Include a file Increment a numerical string Infinity Inheritance/Multiple Inheritance/Single Input loop Integer comparison Integer sequence Interactive programming Introspection Inverted index Inverted syntax J JSON Jensen's Device Josephus problem Joystick position Jump anywhere K K-means++ clustering Kaprekar numbers Keyboard input/Flush the keyboard buffer Keyboard input/Keypress check Keyboard input/Obtain a Y or N response Keyboard macros Knapsack problem/0-1 Knapsack problem/Bounded Knapsack problem/Continuous Knapsack problem/Unbounded Knight's tour Knuth's algorithm S Knuth shuffle L LU decomposition LZW compression Langton's ant Largest int from concatenated ints Last Friday of each month Last letter-first letter Leap year Least common multiple Letter frequency Levenshtein distance Linear congruential generator List comprehensions Literals/Floating point Literals/Integer Literals/String Logical operations Long multiplication Longest common subsequence Longest string challenge Look-and-say sequence Loop over multiple arrays simultaneously Loops/Break Loops/Continue Loops/Do-while Loops/Downward for Loops/For Loops/For with a specified step Loops/Foreach Loops/Infinite Loops/N plus one half Loops/Nested Loops/While Lucas-Lehmer test Luhn test of credit card numbers M MD4 MD5 MD5/Implementation Mad Libs Main step of GOST 28147-89 Man or boy test Mandelbrot set Map range Matrix-exponentiation operator Matrix arithmetic Matrix multiplication Matrix transposition Maze generation Maze solving Median filter Memory allocation Memory layout of a data structure Menu Metaprogramming Metered concurrency Metronome Middle three digits Miller-Rabin primality test Minesweeper game Modular exponentiation Modular inverse Monte Carlo methods Monty Hall problem Morse code Mouse position Multifactorial Multiple distinct objects Multiple regression Multiplication tables Multiplicative order Multisplit Mutex Mutual recursion N N-queens problem Named parameters Narcissist Nautical bell Non-continuous subsequences Non-decimal radices/Convert Non-decimal radices/Input Non-decimal radices/Output Nth root Null object Number names Number reversal game Numeric error propagation Numerical integration Numerical integration/Gauss-Legendre Quadrature O OLE Automation Object serialization One-dimensional cellular automata One of n lines in a file OpenGL Operator precedence Optional parameters Order two numerical lists Ordered Partitions Ordered words P Palindrome detection Pangram checker Parallel calculations Parametric polymorphism Parametrized SQL statement Parsing/RPN calculator algorithm Parsing/RPN to infix conversion Parsing/Shunting-yard algorithm Partial function application Pascal's triangle Pascal's triangle/Puzzle Pattern matching Percentage difference between images Perfect numbers Permutation test Permutations Permutations/Derangements Permutations by swapping Pi Pick random element Pig the dice game Pig the dice game/Player Pinstripe/Display Pinstripe/Printer Play recorded sounds Playing cards Plot coordinate pairs Pointers and references Polymorphic copy Polymorphism Polynomial long division Polynomial regression Power set Pragmatic directives Price fraction Primality by trial division Prime decomposition Priority queue Probabilistic choice Problem of Apollonius Program name Program termination Pythagorean triples Q QR decomposition Quaternion type Queue/Definition Queue/Usage Quine R RCRPG RIPEMD-160

R cont. Random number generator (device) Random number generator (included) Random numbers Range expansion Range extraction Rate counter Ray-casting algorithm Read a configuration file Read a file line by line Read a specific line from a file Read entire file Real constants and functions Record sound Reduced row echelon form Regular expressions Remove duplicate elements Remove lines from a file Rename a file Rendezvous Repeat a string Resistor mesh Respond to an unknown method call Return multiple values Reverse a string Rock-paper-scissors Roman numerals/Decode Roman numerals/Encode Roots of a function Roots of a quadratic function Roots of unity Rosetta Code/Count examples Rosetta Code/Find unimplemented tasks Rosetta Code/Fix code tags Rosetta Code/Rank languages by popularity Rot-13 Run-length encoding Runtime evaluation Runtime evaluation/In an environment S S-Expressions SEDOLs SHA-1 SHA-256 SOAP SQL-based authentication Safe addition Same Fringe Scope/Function names and labels Scope modifiers Search a list Secure temporary file Self-describing numbers Self-referential sequence Semordnilap Send an unknown method call Send email Sequence of non-squares Set Set consolidation Set of real numbers Set puzzle Seven-sided dice from five-sided dice Shell one-liner Short-circuit evaluation Show the epoch Sierpinski carpet Sierpinski triangle Sierpinski triangle/Graphical Sieve of Eratosthenes Simple database Simple windowed application Simulate input/Keyboard Simulate input/Mouse Singleton Singly-linked list/Element definition Singly-linked list/Element insertion Singly-linked list/Traversal Sleep Sockets Sokoban Solve a Hidato puzzle Sort an array of composite structures Sort an integer array Sort disjoint sublist Sort stability Sort using a custom comparator Sorting algorithms/Bead sort Sorting algorithms/Bogosort Sorting algorithms/Bubble sort Sorting algorithms/Cocktail sort Sorting algorithms/Comb sort Sorting algorithms/Counting sort Sorting algorithms/Gnome sort Sorting algorithms/Heapsort Sorting algorithms/Insertion sort Sorting algorithms/Merge sort Sorting algorithms/Pancake sort Sorting algorithms/Permutation sort Sorting algorithms/Quicksort Sorting algorithms/Radix sort Sorting algorithms/Selection sort Sorting algorithms/Shell sort Sorting algorithms/Sleep sort Sorting algorithms/Stooge sort Sorting algorithms/Strand sort Soundex Special characters Special variables Speech synthesis Spiral matrix Stable marriage problem Stack Stack traces Stair-climbing puzzle Standard deviation Start from a main routine Stem-and-leaf plot String case String comparison String concatenation String interpolation (included) String length Strip a set of characters from a string Strip block comments Strip comments from a string Strip control codes and extended characters from a string Strip whitespace from a string/Top and tail Substring Substring/Top and tail Subtractive generator Sudoku Sum and product of an array Sum digits of an integer Sum multiples of 3 and 5 Sum of a series Sum of squares Sutherland-Hodgman polygon clipping Symmetric difference Synchronous concurrency System time T Table creation/Postal addresses Take notes on the command line Temperature conversion Terminal control/Clear the screen Terminal control/Coloured text Terminal control/Cursor movement Terminal control/Cursor positioning Terminal control/Dimensions Terminal control/Display an extended character Terminal control/Hiding the cursor Terminal control/Inverse video Terminal control/Positional read Terminal control/Preserve screen Terminal control/Ringing the terminal bell Terminal control/Unicode output Ternary logic Test a function Text processing/1 Text processing/2 Text processing/Max licenses in use Thiele's interpolation formula Tic-tac-toe Time a function Tokenize a string Top rank per group Topic variable Topological sort Topswops Towers of Hanoi Trabb Pardo–Knuth algorithm Tree traversal Trigonometric functions Truncatable primes Truncate a file Twelve statements U URL decoding URL encoding Unbias a random generator Undefined values Unicode strings Unicode variable names Universal Turing machine Update a configuration file Use another language to call a function User input/Graphical User input/Text V Vampire number Van der Corput sequence Variable-length quantity Variable size/Get Variable size/Set Variables Variadic function Vector products Verify distribution uniformity/Chi-squared test Verify distribution uniformity/Naive Video display modes Vigenère cipher Vigenère cipher/Cryptanalysis Visualize a tree Voronoi diagram W Walk a directory/Non-recursively Walk a directory/Recursively Web scraping Window creation Window creation/X11 Window management Wireworld Word wrap Write float arrays to a text file Write language name in 3D ASCII Write to Windows event log X XML/DOM serialization XML/Input XML/Output XML/XPath Xiaolin Wu's line algorithm Y Y combinator Yahoo! search interface Yin and yang Z Zebra puzzle Zeckendorf arithmetic Zeckendorf number representation Zig-zag matrix

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Draft tasks without implementation

These tasks as drafts, meaning they largely need more work to turn them into full tasks. Perhaps you can help by trying to implement them in NQP (after all, one of the key requirements for a task being non-draft is multiple implementations, preferably in widely different languages) but be aware that this may be difficult because of lack of definition of the task itself.

9 9 billion names of God the integer/Worship of false idols A AVL tree Addition-chain exponentiation Amb Append a record to the end of a text file AudioAlarm Audio Overlap Loop Audio frequency generator B Banker's algorithm Bitcoin/public point to address Boids simulation C Casting out nines Catamorphism Check input device is a terminal Check output device is a terminal Chess player Circles of given radius through two points Closures/Value capture Code segment unload Combinations and permutations Convert decimal number to rational Create an object/Native demonstration Currying D Decision tables Dijkstra's algorithm Draw a clock E Elliptic curve arithmetic Entropy/Narcissist F FASTA format Find URI in text Find duplicate files Find first and last set bit of a long integer G Game of Nim Gaussian elimination

G cont. Generalised floating point addition Generalised floating point multiplication H Hello world/Newbie I IBAN IPC via named pipe IRC gateway Implicit type conversion K K-d tree L Levenshtein distance/Alignment Load animated 3D data M Make a backup file Modular arithmetic Montgomery reduction Morpion solitaire Multiline shebang Musical scale N NYSIIS Names to numbers Natural sorting O Odd word problem Old Russian measure of length Old lady swallowed a fly OpenGL Pixel Shader P Paraffins Parse EBNF Parse an IP Address Parse command-line arguments Permutations/Rank of a permutation Permutations with repetitions Playfair cipher Proof R Ramsey's theorem Read a file character by character/UTF8 Readline interface

R cont. Remote agent/Agent interface Remote agent/Agent logic Remote agent/Simulation Rep-string Reverse the gender of a string Rosetta Code/Find bare lang tags Rosetta Code/List authors of task descriptions Rosetta Code/Run examples Rosetta Code/Tasks sorted by average lines of code Run as a daemon or service Runge-Kutta method S Scripted main Shortest common supersequence Solving coin problems State name puzzle Statistics/Basic Statistics/Normal distribution Straddling checkerboard Subset sum problem Suffix tree T Table creation Terminal control/Restricted width positional input/No wrapping Terminal control/Restricted width positional input/With wrapping Text to HTML Topological sort/Extracted top item Truth table U Unicode polynomial equation Untrusted environment User defined pipe and redirection operators Using a Speech engine to highlight words V VList W Waveform analysis/Doh ray me Waveform analysis/Top and tail

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Requiring Attention

Examples

These tasks have implementations in NQP, but somebody, somewhere, decided that the example implementation was faulty or in some other way requiring attention. If you're familiar with the task and language, please consider reviewing/correcting the example and removing the notice.

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Other pages

These are other pages related to NQP which require attention; with your knowledge and assistance, we can improve the quality of the site's content.

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Not Considered

These tasks are not generally counted toward "unimplemented", as somebody, somewhere, decided that NQP was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

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End of List

Again, feel free to try your hand at any of the tasks listed on this page.