d2-ui
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text/typescript
/// <reference path="../../observable.ts" />
module Rx {
export interface Observable<T> {
/**
* Searches for an element that matches the conditions defined by the specified predicate, and returns
* an Observable sequence with the zero-based index of the first occurrence within the entire Observable sequence.
* @param {Function} predicate The predicate that defines the conditions of the element to search for.
* @param {Any} [thisArg] Object to use as `this` when executing the predicate.
* @returns {Observable} An Observable sequence with the zero-based index of the first occurrence of an element that matches the conditions defined by match, if found; otherwise, –1.
*/
findIndex(predicate: _Predicate<T>, thisArg?: any): Observable<number>;
}
}
(function () {
var o : Rx.Observable<number>;
o = o.findIndex((x) => true);
o = o.findIndex((x) => true, {});
});