Function reinit

docs/app/js/sanddance-app.js:141394–141428

(_, pulse)

        return this.eval(_, pulse);
    },
    reinit (_, pulse) {
        const output = pulse.materialize().fork(), fields = _.fields, query = _.query, indices = this._indices, dims = this._dims, bits = this.value, curr = bits.curr(), prev = bits.prev(), all = bits.all(), out = output.rem = output.add, mod = output.mod, m = query.length, adds = {};
        let add, index, key, mods, remMap, modMap, i, n, f; // set prev to current state
        prev.set(curr); // if pulse has remove tuples, process them first
        if (pulse.rem.length) remMap = this.remove(_, pulse, output);
         // if pulse has added tuples, add them to state
        if (pulse.add.length) bits.add(pulse.add);
         // if pulse has modified tuples, create an index map
        if (pulse.mod.length) {
            modMap = {};
            for(mods = pulse.mod, i = 0, n = mods.length; i < n; ++i)modMap[mods[i]._index] = 1;
        } // re-initialize indices as needed, update curr bitmap
        for(i = 0; i < m; ++i){
            f = fields[i];
            if (!dims[i] || _.modified("fields", i) || pulse.modified(f.fields)) {
                key = f.fname;
                if (!(add = adds[key])) {
                    indices[key] = index = SortedIndex();
                    adds[key] = add = index.insert(f, pulse.source, 0);
                }
                dims[i] = Dimension(index, i, query[i]).onAdd(add, curr);
            }
        } // visit each tuple
        // if filter state changed, push index to add/rem
        // else if in mod and passes a filter, push index to mod
        for(i = 0, n = bits.data().length; i < n; ++i){
            if (remMap[i]) continue;
            else if (prev[i] !== curr[i]) // add if state changed
            out.push(i);
            else if (modMap[i] && curr[i] !== all) // otherwise, pass mods through
            mod.push(i);
        }
        bits.mask = (1 << m) - 1;
        return output;
    },
    eval (_, pulse) {
        const output = pulse.materialize().fork(), m = this._dims.length;
        let mask = 0;