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| Current File : /var/www/talentgenesis_admin_backend/node_modules/rxjs/dist/esm5/internal/operators/single.js |
import { EmptyError } from '../util/EmptyError';
import { SequenceError } from '../util/SequenceError';
import { NotFoundError } from '../util/NotFoundError';
import { operate } from '../util/lift';
import { createOperatorSubscriber } from './OperatorSubscriber';
export function single(predicate) {
return operate(function (source, subscriber) {
var hasValue = false;
var singleValue;
var seenValue = false;
var index = 0;
source.subscribe(createOperatorSubscriber(subscriber, function (value) {
seenValue = true;
if (!predicate || predicate(value, index++, source)) {
hasValue && subscriber.error(new SequenceError('Too many matching values'));
hasValue = true;
singleValue = value;
}
}, function () {
if (hasValue) {
subscriber.next(singleValue);
subscriber.complete();
}
else {
subscriber.error(seenValue ? new NotFoundError('No matching values') : new EmptyError());
}
}));
});
}
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