Version 4 of Repeat Through a Rulebook by Ron Newcomb begins here.

"Allows us to write a repeat loop that steps through all the rules in a rulebook, to count those rules, to pick a random rule, and to ask if a rule is currently listed in a given rulebook."

Use Repeat Through a Rulebook debugging translates as (- Constant LOOP_THRU_RULEBOOKS; -).
Use Repeat Through a Rulebook count debugging translates as (- Constant LOOP_THRU_RULEBOOKS_C; -).
Use Repeat Through a Rulebook find debugging translates as (- Constant LOOP_THRU_RULEBOOKS_F; -).
Use Repeat Through a Rulebook endpoint debugging translates as (- Constant LOOP_THRU_RULEBOOKS_E; -).

• Section - Rules by Number
• Section - The Nothing Rule
• Section - Reasons
• Section - Rule Loops, unmodified
• Section - Rule Loops, modified
• Section - Repeat Through a Single Rule
• Section - Testing commands - unindexed - not for release
• Section - PseudoProcessRulebook and PseudoDB_Rule