38 lines
1.5 KiB
JavaScript
38 lines
1.5 KiB
JavaScript
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import { operate } from '../util/lift';
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import { createOperatorSubscriber } from './OperatorSubscriber';
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export function sequenceEqual(compareTo, comparator = (a, b) => a === b) {
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return operate((source, subscriber) => {
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const aState = createState();
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const bState = createState();
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const emit = (isEqual) => {
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subscriber.next(isEqual);
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subscriber.complete();
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};
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const createSubscriber = (selfState, otherState) => {
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const sequenceEqualSubscriber = createOperatorSubscriber(subscriber, (a) => {
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const { buffer, complete } = otherState;
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if (buffer.length === 0) {
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complete ? emit(false) : selfState.buffer.push(a);
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}
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else {
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!comparator(a, buffer.shift()) && emit(false);
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}
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}, () => {
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selfState.complete = true;
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const { complete, buffer } = otherState;
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complete && emit(buffer.length === 0);
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sequenceEqualSubscriber === null || sequenceEqualSubscriber === void 0 ? void 0 : sequenceEqualSubscriber.unsubscribe();
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});
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return sequenceEqualSubscriber;
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};
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source.subscribe(createSubscriber(aState, bState));
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compareTo.subscribe(createSubscriber(bState, aState));
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});
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}
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function createState() {
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return {
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buffer: [],
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complete: false,
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};
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}
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//# sourceMappingURL=sequenceEqual.js.map
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