REPL console screen

Ruby Jard's REPL engine is powered by Pry, a runtime developer console with powerful introspection capabilities. There are plenty of things you can do with the REPL console:

Ad-hoc code execution
Inspect nested variables (supports syntax highlighting)
Source code browsing
Document browsing
Command shell integration
Navigation around state
Interfere with and change current object state

To make use of all advanced features, please read the Pry documentation.

Some tips to work with the Jard REPL console effectively:

Ruby Jard intercepts the return value after evaluating your input, and performs decoration.
Therefore, syntax highlighting doesn't work with puts. Instead of printing a complicated object into STDOUT, just type a the name of a variable or method call, then press enter.

Don't use puts. Click to enlarge.

When you type a lot, the terminal will become "scrolled" down. You can always scroll out, or use list to clear screen, and bring back the UI.
If there is too much output, Ruby Jard triggers a pager (less by default). You can navigate around the pager with the usual hjkl key bindings. Press q to return to the debugging interface.