27 lines
1.1 KiB
JavaScript
27 lines
1.1 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.distinctUntilChanged = void 0;
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var identity_1 = require("../util/identity");
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var lift_1 = require("../util/lift");
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var OperatorSubscriber_1 = require("./OperatorSubscriber");
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function distinctUntilChanged(comparator, keySelector) {
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if (keySelector === void 0) { keySelector = identity_1.identity; }
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comparator = comparator !== null && comparator !== void 0 ? comparator : defaultCompare;
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return lift_1.operate(function (source, subscriber) {
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var previousKey;
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var first = true;
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source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function (value) {
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var currentKey = keySelector(value);
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if (first || !comparator(previousKey, currentKey)) {
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first = false;
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previousKey = currentKey;
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subscriber.next(value);
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}
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}));
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});
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}
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exports.distinctUntilChanged = distinctUntilChanged;
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function defaultCompare(a, b) {
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return a === b;
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}
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//# sourceMappingURL=distinctUntilChanged.js.map
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