39 lines
1.5 KiB
JavaScript
39 lines
1.5 KiB
JavaScript
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import { __read, __spreadArray } from "tslib";
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import { operate } from '../util/lift';
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import { createOperatorSubscriber } from './OperatorSubscriber';
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import { innerFrom } from '../observable/innerFrom';
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import { identity } from '../util/identity';
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import { noop } from '../util/noop';
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import { popResultSelector } from '../util/args';
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export function withLatestFrom() {
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var inputs = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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inputs[_i] = arguments[_i];
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}
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var project = popResultSelector(inputs);
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return operate(function (source, subscriber) {
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var len = inputs.length;
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var otherValues = new Array(len);
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var hasValue = inputs.map(function () { return false; });
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var ready = false;
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var _loop_1 = function (i) {
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innerFrom(inputs[i]).subscribe(createOperatorSubscriber(subscriber, function (value) {
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otherValues[i] = value;
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if (!ready && !hasValue[i]) {
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hasValue[i] = true;
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(ready = hasValue.every(identity)) && (hasValue = null);
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}
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}, noop));
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};
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for (var i = 0; i < len; i++) {
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_loop_1(i);
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}
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source.subscribe(createOperatorSubscriber(subscriber, function (value) {
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if (ready) {
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var values = __spreadArray([value], __read(otherValues));
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subscriber.next(project ? project.apply(void 0, __spreadArray([], __read(values))) : values);
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}
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}));
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});
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}
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//# sourceMappingURL=withLatestFrom.js.map
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