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j901 4+
Explore the J Language
Ian Clark
Designed for iPad
-
- Free
Screenshots
Description
Improved iPhone formatting.
Watched Nouns.
Factory scripts unbundled under YOUR control.
J is a general purpose programming language inspired by APL, both languages springing from the fertile mind of the late Ken Iverson. J is particularly strong in the mathematical, statistical, and logical analysis of textual and numerical data.
j901 is the follow-on product of j701. This version of the J Integrated Development Environment (J IDE) employs version 9.3 of the J Engine.
How J901 differs from J701:
* Abandons special keyboard for custom keys on system keyboard
* Session log display, whole or part, e.g. inputs-only; or transactions containing a given J primitive or substring
* Code editor, with tabs and find facility
* Shell-type preprocessor for common housekeeping actions upon jscripts and other files
* Separate scenes for displaying the output from "plot" and "viewmat"
* Context-sensitive Help; NuVoc lookup
* New "Mill" feature for studying noun transformations, e.g. numeric arrays and animated character-graphics such as Conway's Game Of Life
Like all J IDEs, this iOS app is offered free of charge as a learning resource for teachers and students of mathematics, statistics, science and engineering. It is also offered without guarantee as a convenience to J experts who normally use a desktop computer for their professional work. Fine-tuned to the iPad, but usable on iPhone, it is first and foremost a vehicle for fun and discovery.
DO NOT USE FOR MISSION-CRITICAL WORK – iOS end-user security trumps app recovery.
What’s New
Version 1.2
Unbundling factory files and folders is now under end-user control: app updates now leave the sandbox (j/ folder) unaltered.
Watched nouns replace 2!:9 (ui) for all except system use.
Watched noun: noun: CLIP_i_ replaces verbs: getclip and: setclip for accessing the system pasteboard.
Hotkey ⌘E now toggles between Home and Edit.
Troublesome verb: monadspaced eliminated, so that syntax coloring no longer relies on system J code residing in the sandbox.
Choose 4 styles of syntax coloring (0:eclectic, 1:jqt, 2:nuvoc, 3:nuvoc nearest system color) via a watched noun: SYNTAX_COLOR_SCHEME_i_.
Edit: trailing blank lines are now tolerated; CRLF in imported scripts is now coverted to LF; the J sentence "if. 1 do." is now correctly colored.
Ratings and Reviews
Phenomenal!
So thankful this was put together! Only programming language I use on my phone
Excellent
Outstanding port of J to IOS. Very handy.
App Privacy
The developer, Ian Clark, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Information
- Seller
- Ian Clark
- Size
- 50.1 MB
- Category
- Education
- Compatibility
-
- iPhone
- Requires iOS 16.2 or later.
- iPad
- Requires iPadOS 16.2 or later.
- Mac
- Requires macOS 13.3 or later and a Mac with Apple M1 chip or later.
- Apple Vision
- Requires visionOS 1.0 or later.
- Languages
-
English
- Age Rating
- 4+
- Copyright
- © 2023, 2022 Jsoftware Inc.
- Price
- Free