Function Sieve

docs/app/js/sanddance-app.js:118533–118536

* Propagates a new pulse without any tuples so long as the input * pulse contains some added, removed or modified tuples. * @param {object} params - The parameters for this operator. * @constructor

(params)

 * @param {object} params - The parameters for this operator.
 * @constructor
 */ function Sieve(params) {
    (0, _vegaDataflow.Transform).call(this, null, params);
    this.modified(true); // always treat as modified
}
(0, _vegaUtil.inherits)(Sieve, (0, _vegaDataflow.Transform), {
    transform (_, pulse) {
        this.value = pulse.source;