Labs/Index

This documents the Labs system in J806 and later. The earlier version of Labs is documented here.

The Labs system allows you to run through a script step by step, displaying comments and executing the code.

The scripts are run in a normal J session, and other J expressions can be tried while working through the script.

Any script can be run this way. However, a script may contain special comments that are recognized by the Labs system, for example to allow the script to be run in sections.

The file extension .ijt may be used to indicate a script that is specifically intended for use with Labs.

The J IDEs provide menu access to several labs. In JHS, select menu tour|labs, and in Jqt, select menu Help|Studio|Labs.

Basic Usage
The lab Verb
Script Layout
Lab Commands
Deprecated Commands
Migration