J Engine Installer

a lightweight npm package to install/update the J engine on supported architectures and platforms:

* mac/x86_64
* lin/x86_64

to be added:

* windows/x64_64

Installation

$ npm install @monumentai/j -g
$ echo 2+2 | j

FAQ

The installer fails with EACCESS.

On correctly configured systems, the global npm installation directory (e.g. /usr/local/lib/node_modules) is owned by the superuser. use the following command to give npm the necessary one-time permissions:

$ sudo npm install @monumentai/j --global --unsafe

Relaxing ownership of the npm directory is not recommended.

On macOS, calling j gives me Load library /Users/lib/node_modules/@monumentai/j/j902/bin/libj.dylib failed: No such file or directory

The symlink might be broken. Fix it by

$ ln -hfs /usr/local/lib/node_modules/@monumentai/j/j902/bin/jconsole /usr/local/bin/j

Is this different from the official J Installation?

For now, this package installs from the official source. A special version developed by MonumentAI will be available soon.

How can I learn J?

Please read tutorials from the J wiki.