Watching variables in the listener
Factor handbook > Developer tools > The listener

Next:listener ( -- )


The listener prints values of dynamic variables which are added to a watch list:
visible-vars


To add or remove a single variable:
show-var ( var -- )

hide-var ( var -- )


To add and remove multiple variables:
show-vars ( seq -- )

hide-vars ( seq -- )


Clearing the watch list:
hide-all-vars ( -- )