How to set different icons for multiple running instances of the same application?

Question

linux

System: arch with openbox and tint2.
Situation following:
Several vncview are started. How to set its own icon for each instance, so as not to get confused later.

Answer 1

As one of the options, make symlinks to the binary, create several .desktop files in which you specify different symlinks and icons for them.

Answer 2

The pg.any function is asynchronous and, as a result res[0].error = errors;, is executed before processing unique logins. To work correctly, you need to postpone the work with errors until all queries to the database are executed:

User.prototype.join = function (user, res) {
    var errors = [],
        unique = [];

    for (var i = 0; i < user.length; i++) {
        if (user[i].required && !user[i].value) {
            errors.push('Вы не ввели логин');
        }

        if (user[i].unique) {
            var query = pg.any('SELECT id FROM users WHERE login=$1', [user[i].value]).then(function (user) {
                if (user.length) {
                    errors.push('Пользователь с таким логином уже зарегистрирован');
                }
            });

            unique.push(query);
        }
    }

    return Promise.all(unique).then(function () {
        res[0].error = errors;
    });
};

And the returns to the routes need to be wrapped in then:

// неправильно

join(user, res);
// дальнейшая обработка res



// правильно

join(user, res).then(function () {
    // дальнейшая обработка res
});

The design (function (i) { ... })(i);in the original version is meaningless, so I removed it. And if (user[i].unique == true) {identical if (user[i].unique) {.
Due to the fact that I do not see the full code, there may be errors.