| 1 | import {Operator} from 'vega-dataflow';
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| 2 | import {inherits} from 'vega-util';
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| 3 |
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| 4 | /**
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| 5 | * Merge a collection of value arrays.
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| 6 | * @constructor
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| 7 | * @param {object} params - The parameters for this operator.
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| 8 | * @param {Array<Array<*>>} params.values - The input value arrrays.
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| 9 | */
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| 10 | export default function MultiValues(params) {
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| 11 | Operator.call(this, null, update, params);
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| 12 | }
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| 13 |
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| 14 | inherits(MultiValues, Operator);
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| 15 |
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| 16 | function update(_) {
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| 17 | return (this.value && !_.modified())
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| 18 | ? this.value
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| 19 | : _.values.reduce((data, _) => data.concat(_), []);
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| 20 | }
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