Bully

Truth tables for the world!

What?

This is Bully, my little Boolean expression calculator. I’d made a similar project in college while studying for a discrete math final, and decided to port my efforts to a TypeScript and React shell while learning a bit more about parsers. (The old one used a couple of regular expressions and eval(). I know.)

Try it on Vercel!

Supported Syntax

For more details see the tests and Peggy grammar file, but in short:

• Variables shown in the table (A, B, C, etc.) can be referenced by their names: D
• Boolean sums/disjunctions/OR operations are written with +: A + B
• Literal true and false are evaluated as you might expect: true + D
• Boolean products/conjunctions/AND operations are written with * or implicitly: A * D, AD
• Boolean negation/NOT operations are written with a postfix ': A'D, true'
• Parentheses work as you might expect.