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{"version":3,"file":"elementAt.js","sourceRoot":"","sources":["../../src/operator/elementAt.ts"],"names":[],"mappings":";AAEA,0BAAyC,wBAAwB,CAAC,CAAA;AAElE;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAyCG;AACH,mBAAkD,KAAa,EAAE,YAAgB;IAC/E,MAAM,CAAC,qBAAW,CAAC,KAAK,EAAE,YAAY,CAAC,CAAC,IAAI,CAAC,CAAC;AAChD,CAAC;AAFe,iBAAS,YAExB,CAAA","sourcesContent":["\nimport { Observable } from '../Observable';\nimport { elementAt as higherOrder } from '../operators/elementAt';\n\n/**\n * Emits the single value at the specified `index` in a sequence of emissions\n * from the source Observable.\n *\n * <span class=\"informal\">Emits only the i-th value, then completes.</span>\n *\n * <img src=\"./img/elementAt.png\" width=\"100%\">\n *\n * `elementAt` returns an Observable that emits the item at the specified\n * `index` in the source Observable, or a default value if that `index` is out\n * of range and the `default` argument is provided. If the `default` argument is\n * not given and the `index` is out of range, the output Observable will emit an\n * `ArgumentOutOfRangeError` error.\n *\n * @example <caption>Emit only the third click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var result = clicks.elementAt(2);\n * result.subscribe(x => console.log(x));\n *\n * // Results in:\n * // click 1 = nothing\n * // click 2 = nothing\n * // click 3 = MouseEvent object logged to console\n *\n * @see {@link first}\n * @see {@link last}\n * @see {@link skip}\n * @see {@link single}\n * @see {@link take}\n *\n * @throws {ArgumentOutOfRangeError} When using `elementAt(i)`, it delivers an\n * ArgumentOutOrRangeError to the Observer's `error` callback if `i < 0` or the\n * Observable has completed before emitting the i-th `next` notification.\n *\n * @param {number} index Is the number `i` for the i-th source emission that has\n * happened since the subscription, starting from the number `0`.\n * @param {T} [defaultValue] The default value returned for missing indices.\n * @return {Observable} An Observable that emits a single item, if it is found.\n * Otherwise, will emit the default value if given. If not, then emits an error.\n * @method elementAt\n * @owner Observable\n */\nexport function elementAt<T>(this: Observable<T>, index: number, defaultValue?: T): Observable<T> {\n return higherOrder(index, defaultValue)(this);\n}\n"]}