booleval

Logical expression evaluator.

Note: for now, the supported operators are >, &, |, =, and !.

This packages takes an string like a & b and calculates its truth table. It can handle expressions that contain errors such as missing closing parenthesis. It exports three functions: evaluar, rpn, and leer. It's meant to be used like this:

const result_maybe = evaluar(rpn(leer('a & b')))

Because these functions can handle expressions with errors in them they return reports. Reports are objects with two properties: error and resultado. If error is true then resultado contains information about the error found. Otherwise resultado contains the return of the function.

With that in mind, result_maybe contains either the truth table or the error found in the expression. Assuming there aren't any errors in the expression, result_maybe.resultado is an object with two props: values and vars. vars is an array of type boolean[][] that has one entry for every row of the truth table, and each one of those has the value of each variable for that row. Similarly, values (array of type boolean[]) contains the value of the expression for every row.

I'm in the process of translating the source to English so using this package or reading the code should be easier in the future.