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import { operate } from '../util/lift';
import { mergeInternals } from './mergeInternals';
export function mergeScan(accumulator, seed, concurrent = Infinity) {
return operate((source, subscriber) => {
let state = seed;
return mergeInternals(source, subscriber, (value, index) => accumulator(state, value, index), concurrent, (value) => {
state = value;
}, false, undefined, () => (state = null));
});
}
//# sourceMappingURL=mergeScan.js.map
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