Method evZooms

src/common/style/CartoCSS.js:4364–4372

(env)

    // Zooms can use variables. This replaces CartoCSS.Tree.Zoom objects on selectors
    // with simple bit-arrays that we can compare easily.
    evZooms(env) {
        for (var i = 0; i < this.selectors.length; i++) {
            var zval = CartoCSS.Tree.Zoom.all;
            for (var z = 0; z < this.selectors[i].zoom.length; z++) {
                zval = this.selectors[i].zoom[z].ev(env).zoom;
            }
            this.selectors[i].zoom = zval;
        }
    }

    flatten(result, parents, env) {
        var selectors = [], i, j;