@sunzhongmou/math/lib/expression.js

Mathematical knowledge context

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Expression = exports.Operations = void 0;
var Operations;
(function (Operations) {
    Operations[Operations["ADD"] = 0] = "ADD";
    Operations[Operations["SUB"] = 1] = "SUB";
})(Operations = exports.Operations || (exports.Operations = {}));
class Expression {
    constructor(destOperand, operation, operand) {
        this.destinationOperand = destOperand;
        this.operationSets = [];
        this.addOperationSet(operation, operand);
    }
    addOperationSet(operation, operand) {
        this.operationSets.push({ operand, operation });
    }
    sameValueAs(other) {
        return (this.destinationOperand === other.destinationOperand &&
            this.operationSets === other.operationSets);
    }
    getOperationSetsRaw() {
        return this.operationSets.reduce((raw, oSet) => `${raw}${oSet.operation === Operations.ADD ? ' + ' : ' - '}${oSet.operand}`, '');
    }
    getRaw() {
        return `${this.destinationOperand}${this.getOperationSetsRaw()} =`;
    }
    execute() {
        let result = this.destinationOperand;
        for (const oSet of this.operationSets) {
            switch (oSet.operation) {
                case Operations.ADD:
                    result += oSet.operand;
                    break;
                case Operations.SUB:
                    result -= oSet.operand;
                    break;
            }
        }
        return result;
    }
}
exports.Expression = Expression;
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