Reports:Tasks not implemented in Common Lisp

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Awareness

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Not implemented

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

A Abundant, deficient and perfect number classifications Active Directory/Connect Active Directory/Search for a user Active object Aliquot sequence classifications Amicable pairs Append a record to the end of a text file Arena storage pool Arithmetic-geometric mean/Calculate Pi Atomic updates Average loop length Averages/Mean time of day B Bitcoin/address validation Bitcoin/public point to address Bitmap/Bézier curves/Cubic Bitmap/Bézier curves/Quadratic Bitmap/Flood fill Bitmap/Histogram Bitmap/PPM conversion through a pipe Bitmap/Read an image through a pipe Bitwise IO Box the compass Brownian tree C Calendar Calendar - for "REAL" programmers Call a function Call an object method Canny edge detector Carmichael 3 strong pseudoprimes Catalan numbers/Pascal's triangle Catmull–Clark subdivision surface Chat server Check Machin-like formulas Checkpoint synchronization Circles of given radius through two points Color quantization Colour bars/Display Colour pinstripe/Printer Combinations and permutations Combinations with repetitions Compare sorting algorithms' performance Conjugate transpose Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N) Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2) Create a file on magnetic tape Create an HTML table Create an object at a given address D Date manipulation Death Star Deconvolution/2D+ Determine if only one instance is running Dinesman's multiple-dwelling problem Discordian date Distributed programming Doubly-linked list/Traversal Draw a clock Draw a cuboid Draw a sphere Dutch national flag problem E Empty program Enforced immutability Events Executable library Execute SNUSP Extensible prime generator Extreme floating point values F Fast Fourier transform Fibonacci word Fibonacci word/fractal Find common directory path Find largest left truncatable prime in a given base Find the last Sunday of each month First class environments Five weekends Flipping bits game Flow-control structures Four bit adder Fractal tree Function frequency G GUI/Maximum window dimensions GUI component interaction GUI enabling/disabling of controls Galton box animation Gaussian elimination Generate Chess960 starting position Globally replace text in several files Go Fish Greyscale bars/Display Guess the number/With feedback (player) H HTTPS/Authenticated

H cont. HTTPS/Client-authenticated Handle a signal Hello world/Line printer Hello world/Newbie Here document Heronian triangles Hickerson series of almost integers History variables Honeycombs Horizontal sundial calculations Hough transform I Image convolution Integer overflow Iterated digits squaring J Joystick position Jump anywhere K K-d tree K-means++ clustering Keyboard input/Flush the keyboard buffer Keyboard input/Keypress check Keyboard macros Knapsack problem/Continuous Knight's tour L Largest int from concatenated ints Last Friday of each month Left factorials Longest string challenge Lucas-Lehmer test Ludic numbers M MD5/Implementation Mad Libs Main step of GOST 28147-89 Make directory path Mandelbrot set Matrix arithmetic Maze solving Median filter Memory layout of a data structure Metered concurrency Metronome Morse code Mouse position Multiplicative order Multisplit Munching squares N Natural sorting Nautical bell Numeric error propagation O OLE Automation Old lady swallowed a fly Operator precedence Order disjoint list items P Paraffins Parallel calculations Parametrized SQL statement Parse an IP Address Parsing/RPN to infix conversion Parsing/Shunting-yard algorithm Pascal's triangle/Puzzle Penney's game Percolation/Bond percolation Percolation/Mean cluster density Percolation/Mean run density Percolation/Site percolation Permutations/Derangements Permutations/Rank of a permutation Permutations by swapping Phrase reversals Pi Pinstripe/Display Pinstripe/Printer Play recorded sounds Plot coordinate pairs Price fraction Priority queue Problem of Apollonius Q Quaternion type Quickselect algorithm R Random number generator (device) Random number generator (included) Ranking methods Read a configuration file Record sound Rendezvous Rep-string Resistor mesh Rock-paper-scissors Rosetta Code/Count examples Rosetta Code/Find bare lang tags Rosetta Code/Find unimplemented tasks

R cont. Rosetta Code/Fix code tags Rosetta Code/Rank languages by popularity Runge-Kutta method S SOAP SQL-based authentication Safe addition Same Fringe Scope/Function names and labels Secure temporary file Semordnilap Send email Sequence of primes by Trial Division Set of real numbers Set puzzle Sierpinski triangle/Graphical Simulate input/Keyboard Simulate input/Mouse Sokoban Solve a Hidato puzzle Solve a Holy Knight's tour Solve a Hopido puzzle Solve a Numbrix puzzle Solve the no connection puzzle Sort disjoint sublist Sorting algorithms/Bead sort Sorting algorithms/Comb sort Sorting algorithms/Radix sort Sorting algorithms/Sleep sort Sorting algorithms/Stooge sort Sparkline in unicode Special characters Speech synthesis Stable marriage problem Start from a main routine State name puzzle Statistics/Basic Stem-and-leaf plot Stern-Brocot sequence Strip block comments Sutherland-Hodgman polygon clipping T Table creation/Postal addresses Take notes on the command line 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 Test a function Text processing/2 The ISAAC Cipher The Twelve Days of Christmas Topic variable Topswops Total circles area Truncate a file U URL decoding URL encoding Ulam spiral (for primes) Unicode strings Unix/ls Update a configuration file Use another language to call a function V Vampire number Variable-length quantity Variable size/Set Verify distribution uniformity/Chi-squared test Video display modes Vigenère cipher/Cryptanalysis Visualize a tree Vogel's approximation method Voronoi diagram W Window management Word wrap World Cup group stage Write language name in 3D ASCII Write to Windows event log X Xiaolin Wu's line algorithm Y Yahoo! search interface Yin and yang Z Zebra puzzle Zeckendorf arithmetic Zhang-Suen thinning algorithm

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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 Common Lisp (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.

2 2048 9 9 billion names of God the integer/Worship of false idols A ASCII art diagram converter AVL tree Addition-chain exponentiation Assertions in design by contract AudioAlarm Audio Overlap Loop Audio frequency generator B Banker's algorithm Base64 encode data Bilinear interpolation Birthday problem Blackjack strategy Boids simulation Brace expansion C Chess player Circle sort Code segment unload Combinations with repetitions/Square Digit Chain Commatizing numbers Compare a list of strings Create an object/Native demonstration Currency D Decimal floating point number to binary Decision tables Deming's Funnel Dice game probabilities Dijkstra's algorithm E Egyptian fractions Elementary cellular automaton/Infinite length Elementary cellular automaton/Random Number Generator Elliptic curve arithmetic Emirp primes Entropy/Narcissist Exponentiation order F FASTA format FTP Farey sequence File extension is in extensions list Find URI in text Find duplicate files Find first and last set bit of a long integer

F cont. Find palindromic numbers in both binary and ternary bases Free polyominoes enumeration G Generalised floating point addition Generalised floating point multiplication I I.Q. Puzzle IPC via named pipe IRC gateway Idiomatically determine all the characters that can be used for symbols Idiomatically determine all the lowercase and uppercase letters Implicit type conversion Index finite lists of positive integers Input/Output for Lines of Text Input/Output for Pairs of Numbers J Just in time processing on a character stream K Kahan summation L Levenshtein distance/Alignment Lucky and even lucky numbers M Modular arithmetic Montgomery reduction Morpion solitaire Most frequent k chars distance Multi-dimensional array Musical scale N N-body problem NYSIIS Native shebang Nonoblock Nonogram solver O Old Russian measure of length One-time pad OpenGL Pixel Shader OpenWebNet Password P Parse EBNF Parse command-line arguments Perlin noise Permutations with repetitions Playfair cipher Poker hand analyser Process SMIL directives in XML data Proof Proper divisors R Ramsey's theorem Readline interface

R cont. Recursive descent parser generator Remote agent/Agent interface Remote agent/Agent logic Remote agent/Simulation Reverse the gender of a string 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 S Self-hosting compiler Separate the house number from the street name Shortest common supersequence Solving coin problems Sorting algorithms/Cycle sort Sorting algorithms/Patience sort Sorting algorithms/Tree sort on a linked list Starting a web browser Statistics/Normal distribution Straddling checkerboard Subset sum problem Suffix tree Superpermutation minimisation T Table creation Taxicab numbers Terminal control/Restricted width positional input/No wrapping Terminal control/Restricted width positional input/With wrapping Test integerness Text to HTML Time-based One-time Password Algorithm Tokenize a string with escaping Topological sort/Extracted top item Transportation problem Truth table U Unicode polynomial equation Untrusted environment User defined pipe and redirection operators Using a Speech engine to highlight words Using the Meetup.com API V VList W Waveform analysis/Doh ray me Waveform analysis/Top and tail X XML Validation

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Requiring Attention

Examples

These tasks have implementations in Common Lisp, 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.

F

• Factors of a Mersenne number

W

• Window creation/X11

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Other pages

These are other pages related to Common Lisp 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 Common Lisp 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.