Function Operator

docs/app/js/sanddance-app.js:107473–107482

* An Operator is a processing node in a dataflow graph. * Each operator stores a value and an optional value update function. * Operators can accept a hash of named parameters. Parameter values can * either be direct (JavaScript literals, arrays, objects) or indirect * (other operators whose val

(init, update1, params, react)

 *   listen for changes to upstream operators included as parameters.
 * @see parameters
 */ function Operator(init, update1, params, react) {
    this.id = ++OP_ID;
    this.value = init;
    this.stamp = -1;
    this.rank = -1;
    this.qrank = -1;
    this.flags = 0;
    if (update1) this._update = update1;
    if (params) this.parameters(params, react);
}
function flag(bit) {
    return function(state) {
        const f = this.flags;