Bootstrap, pull-left for small devices

Question

I\'m building a site in Bootstrap 3. Is there anyway to make a element use the class pull-left on smaller devices and use pull-right on larger ones?

Something like:

Answer 1

LESS version of @Alex's answer

@media (max-width: @screen-xs-max) {
    .pull-xs-left {
        .pull-left();
    }

    .pull-xs-right {
        .pull-right();
    }
}

@media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
    .pull-sm-left {
        .pull-left();
    }

    .pull-sm-right {
        .pull-right();
    }
}

@media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
    .pull-md-left {
        .pull-left();
    }

    .pull-md-right {
        .pull-right();
    }
}

@media (min-width: @screen-lg-min) {
    .pull-lg-left {
        .pull-left();
    }

    .pull-lg-right {
        .pull-right();
    }
}