7-hex

class Hex {
    constructor(value) {
        this.value = value;
    }

    valueOf() {
        return this.value;
    }

    toString() {
        return `0x${this.value.toString(16).toUpperCase()}`;
    }

    plus(input) {
        if (typeof input === 'object') {
            let result = this.value + input.value;
            return new Hex(result);
        } else {
            let result = this.value + input;
            return new Hex(result);
        }
    }

    minus(input) {
        if (typeof input === 'object') {
            let result = this.value - input.value;
            return new Hex(result);
        } else {
            let result = this.value - input;
            return new Hex(result);
        }
    }

    parse(hexa) {
        return hexa.toString(10);
    }
}