find.js
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/** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { Subscriber } from '../Subscriber';
export function find(predicate, thisArg) {
if (typeof predicate !== 'function') {
throw new TypeError('predicate is not a function');
}
return function (source) { return source.lift(new FindValueOperator(predicate, source, false, thisArg)); };
}
var FindValueOperator = /*@__PURE__*/ (function () {
function FindValueOperator(predicate, source, yieldIndex, thisArg) {
this.predicate = predicate;
this.source = source;
this.yieldIndex = yieldIndex;
this.thisArg = thisArg;
}
FindValueOperator.prototype.call = function (observer, source) {
return source.subscribe(new FindValueSubscriber(observer, this.predicate, this.source, this.yieldIndex, this.thisArg));
};
return FindValueOperator;
}());
export { FindValueOperator };
var FindValueSubscriber = /*@__PURE__*/ (function (_super) {
tslib_1.__extends(FindValueSubscriber, _super);
function FindValueSubscriber(destination, predicate, source, yieldIndex, thisArg) {
var _this = _super.call(this, destination) || this;
_this.predicate = predicate;
_this.source = source;
_this.yieldIndex = yieldIndex;
_this.thisArg = thisArg;
_this.index = 0;
return _this;
}
FindValueSubscriber.prototype.notifyComplete = function (value) {
var destination = this.destination;
destination.next(value);
destination.complete();
this.unsubscribe();
};
FindValueSubscriber.prototype._next = function (value) {
var _a = this, predicate = _a.predicate, thisArg = _a.thisArg;
var index = this.index++;
try {
var result = predicate.call(thisArg || this, value, index, this.source);
if (result) {
this.notifyComplete(this.yieldIndex ? index : value);
}
}
catch (err) {
this.destination.error(err);
}
};
FindValueSubscriber.prototype._complete = function () {
this.notifyComplete(this.yieldIndex ? -1 : undefined);
};
return FindValueSubscriber;
}(Subscriber));
export { FindValueSubscriber };
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