To contribute a script, edit this page, creating a link to a new page under Scripts and a brief description. Then visit the new page and fill it with your script along with documentation for its use. If you want the page to be Owned, which will prevent other users from modifying it, contact an administrative WikiGnome for help. Otherwise the page will be Open and can be modified by all.
You can make it easier for others to use your script if you create a downloadable attachment containing it. To do so, insert the tag
attachment:attachment-name (example: attachment:alphabeta.ijs)
somewhere in your script's page. When you save the changes to your page, you will be prompted to supply the file, which will be saved in the Wiki as an Attachment. You can look at the attachments to a page by going through the 'More Actions' dropdown box under the tabs at the top of each page.
If you want to comment on the contents of a page, insert your comments in the page itself, or if the page is Owned, insert your remarks on this page.
Scripts can be installed anywhere in your system. A convenient place for scripts is the misc subdirectory of addons, i.e. jpath '~addons/misc'.
Script name |
Despription |
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Given a scrambled line, find the shortest sequence of rotations to restore the original position |
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is a structure for solving two-player games using alpha-beta pruning. You supply the functions to evaluate positions and suggest moves |
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reads APL*PLUS sf files into J |
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example of how to work with files larger than 2 gigabytes. The application breakupBigFiles2CD.ijs allows us to break up large files into smaller pieces and to re-assemble them |
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provides a tool for encryping and decrypting strings using the Arc 4 algorithm. Arc 4 is Compatible with the RC4 algorithm per Schneier's Applied Cryptography, 2nd edition |
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generates a deck of cards as a graphical bitmap suitable for visualizing card layouts. The deck contains 52 cards, a joker, two coats and a blank |
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lays out a chess board using a graphical bitmap suitable for visualizing chess problem or puzzle layouts |
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applies color adjustments to an image using brightness, contrast and gamma with a curve plot against the image histogram |
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converts plain text files in codepages to utf8 |
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provides a J API for a Windows DDEML client. The verbs issue DDE requests or DDE executes |
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drawing prototype |
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to bring up an input window requesting the user to supply a "source" and "destination" directory; has explicit event-loop handler and uses the directory browsing facility |
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contains verbs for copying and deleting directory trees |
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an extension to the edit verb |
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is an editable version of wdview |
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implement both FastCGI and SCGI servers |
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does a search and replace to change use of dotted parameters x. and y. etc. to x and y in scripts and labs |
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provides windowing and other utility functions useful when using the FFT addon |
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provides ad hoc image creator verb, which generates images based on gl2 script definition and size |
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defines utilities for processing GPS waypoints from GPX, GoogleEarth KML and csv POI (Point of Interest) files |
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given an URL downloads the resource from the Internet |
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ideogram builder |
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defines covers of the Windows API functions for reading and writing INI (*.ini) files |
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converts dates and times to and from Julian days. Included are verbs for; converting local system time to UTC/GMT time and back, and customizing the formating of dates and times |
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deals with 2-dimensional arrays of boxes where each row is a data record and one column, usually column 0, is a key field. Verbs are provided to retrieve from and operate on such arrays |
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provides routines for logging messages and (optionally) displaying them in a small window. See "exampleUses" at the end of the script for examples of how you might use these capabilities |
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transforms normal text to morse code |
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implement a simple nonblocking web server |
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reads and writes Excel spreadsheets using Windows OLE |
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demonstrate how to open OOo calc using ole32 api |
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is a prototype of fast image panning using indexed subset of the original image in a view |
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is a simple demonstration of how to store pictures in database |
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Plotting boolean 3-array, roughly equivalent to 3D version of viewmat. Also plots a list of 3-coordinates similarly |
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pretty prints J scripts |
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routs TCP connections and requests to particular servers through designated ports of other servers. Good to fool VPN to expose its machines to non-member connections |
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shows how to make real-time plot updated at regular intervals using the timer event |
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provides a tool for exploring Quadratic Equations. This can be used for teaching at a high school maths level |
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provides a dyadic verb, qdoj that allows you to easily quote the J Dictionary (Dictionary of J, DoJ). The utility should make it easier for J users to communicate with each other regarding the documentation, as well as providing a method to automatically build data from the documentation (for example, the mapping of 3!:0 onto human-readable names from the 3!: page) |
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is a minimal Scheme interpreter |
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as hierarchical persistence for J objects in an executable and human readable format, leveraging dynamically typed and interpreted environment |
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is a collection of useful tools for J Session Manager, such as selecting global definitions, etc |
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is a GUI version of the Set card game described in the Set Game essay |
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control for dynamically resizing boundary between two or more controls. Has a vertical and horizontal variety. Capable of having multiple splitters in one window |
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produces stereo view of 3D plots |
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provides 3 dyadic verbs entries, removals, and tryHard that provide a non-GUI facility for manually solving Su Doku grids. The scripts a) check your entries and removals for validity given the current state of the grid you are solving, and b) display extra information about those valid possibilities in each grid cell |
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allows to run external processes using command-line interface and input-output streams. Updated for 64-bit |
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Text User Interface prototype |
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steps through the process of tracing a J sentence |
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implements a treeview control in J |
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provides a tool for exploring Trigonomic Equations. This can be used for teaching at a high school maths level |
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puzzle consisting of two overlapping circular disks, which can be thought of 2D Rubik's Cube |
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reads unicode text files in various formats |
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extracts a Zip archive to a specified directory |
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provides a example for updating a PSE4 Organizer database |
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is method of encryption that uses a series of different Caesar ciphers based on the letters of a keyword |
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Dynamically patches viewmat to show the current mouse position and corresponding color in that point |
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Used to trace all wd input and output to help debug your code or learn how others' works |
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provides a J API for Windows Direct I/O. The verbs read sectors and return disk device information. Also, there is sample verb for copying a file with read errors |
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save variables to file, allows J variables to be written to and from files |
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zips and unzips directory trees using the arc/zip Addon |
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is a prototype of fast image zooming using indexed nearest neighbor interpolation |