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Grokking the Coding Interview Patterns in JavaScript

Solution: Parsing a Boolean Expression

Explore how to parse complex boolean expressions by using a stack-based method that evaluates nested operations like NOT, AND, and OR. Understand how to process expressions from the innermost parentheses outward and implement this in JavaScript to return correct boolean results.

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Statement

You are given a string, expression, that represents a boolean expression. The expression can take one of the following forms:

  • 't': Represents the boolean value TRUE.

  • 'f': Represents the boolean value FALSE.

  • '!(expr)': Represents a NOT operation applied to a subexpression expr. It returns the logical negation of expr.

  • '&(expr1, expr2, ..., exprN)': Represents an AND operation over one or more subexpressions. It returns TRUE only if all subexpressions evaluate to TRUE. ...