@enigmaoffline/node-exp-solver/lib/aux.js

Mathematical expression solver / Reverse Polish Notation calculator for NodeJS

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Aux = void 0;
var Aux = /** @class */ (function () {
    function Aux() {
    }
    Aux.precMap = {
        '+': 1,
        '-': 1,
        '*': 2,
        '/': 2,
        '^': 3,
    };
    Aux.assoMap = {
        '+': 0,
        '-': 0,
        '*': 0,
        '/': 0,
        '^': 1,
    };
    Aux.funcMap = {
        'sin': 0,
        'cos': 0,
        'tan': 0,
        'max': 0,
        'min': 0,
        'ln': 0,
        'log': 0,
    };
    Aux.isOP = function (op) { return ['+', '-', '*', '/', '^'].indexOf(op) !== -1; };
    Aux.isLA = function (op) { return ['+', '-', '*', '/'].indexOf(op) !== -1; };
    Aux.isPA = function (op) { return op === '(' || op === ')'; };
    Aux.validate = function (tokens) {
        var stack = [];
        for (var i = 0; i < tokens.length; ++i) {
            var token = tokens[i];
            if (token === '(')
                stack.push('(');
            if (token === ')') {
                if (stack.length === 0)
                    return false;
                stack.pop();
            }
        }
        return stack.length === 0;
    };
    return Aux;
}());
exports.Aux = Aux;
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