@enigmaoffline/node-exp-solver/lib/index.d.ts

Mathematical expression solver / Reverse Polish Notation calculator for NodeJS

declare class Solver {
    /**
     * Tokenize an infix-notated expression string
     * @param {string} exp      - mathematical expression
     * @returns {Array<string>} - tokenized expression
     */
    static tokenize: (exp: string) => Array<string>;
    /**
     * Converts an infix-notated expression to reverse polish notation
     * @param {Array<string>} exp   - tokenized infix-notated expression
     * @returns {Array<string>}     - converted RPN expression
     */
    static toRPN: (exp: Array<string>) => Array<string>;
    /**
     * Evaluates an infix-notated expression
     * @param {Array<string>} exp   - tokenzied infix-notated expression
     * @returns                     - evaluated value
     */
    static solve: (exp: Array<string>) => number;
    /**
     * Evaluates a reverse polish notated expression
     * @param {Array<string>} rpn   - tokenized rpn expression
     * @returns {number}            - evaluated value
     */
    static solveRPN: (rpn: Array<string>) => number;
    /**
     * Recursively solve an RPN expression
     * @param {Array<string>} rpn       - original RPN expression
     * @param {Array<number>} stack     - memory stack used for recursive computation
     * @returns {number}                - evaluated value
     */
    private static solveRec;
}
export = Solver;