本文整理匯總了TypeScript中rxjs/Subject.Subject.withLatestFrom方法的典型用法代碼示例。如果您正苦於以下問題：TypeScript Subject.withLatestFrom方法的具體用法？TypeScript Subject.withLatestFrom怎麽用？TypeScript Subject.withLatestFrom使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類rxjs/Subject.Subject的用法示例。
在下文中一共展示了Subject.withLatestFrom方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: constructor
constructor() {
this._tagOperation$ = new Subject<ICreateTagOperation>();
this._create$ = new Subject<number[]>();
this._delete$ = new Subject<void>();
this._configuration$ = new Subject<ITagConfiguration>();
this._tag$ = this._tagOperation$
.scan<OutlineCreateTag>(
(tag: OutlineCreateTag, operation: ICreateTagOperation): OutlineCreateTag => {
return operation(tag);
},
null)
.share();
this._create$
.withLatestFrom(
this._configuration$,
(coordinate: number[], type: ITagConfiguration): [number[], ITagConfiguration] => {
return [coordinate, type];
})
.map<ICreateTagOperation>(
(ct: [number[], ITagConfiguration]): ICreateTagOperation => {
return (tag: OutlineCreateTag): OutlineCreateTag => {
let coordinate: number[] = ct[0];
let configuration: ITagConfiguration = ct[1];
if (configuration.createType === "rect") {
let geometry: RectGeometry = new RectGeometry([
coordinate[0],
coordinate[1],
coordinate[0],
coordinate[1],
]);
return new OutlineCreateTag(geometry, { color: configuration.createColor });
} else if (configuration.createType === "polygon") {
let geometry: PolygonGeometry = new PolygonGeometry([
[coordinate[0], coordinate[1]],
[coordinate[0], coordinate[1]],
[coordinate[0], coordinate[1]],
]);
return new OutlineCreateTag(geometry, { color: configuration.createColor });
}
return null;
};
})
.subscribe(this._tagOperation$);
this._delete$
.map<ICreateTagOperation>(
(): ICreateTagOperation => {
return (tag: OutlineCreateTag): OutlineCreateTag => {
return null;
};
})
.subscribe(this._tagOperation$);
}示例2: function
/**
* paging control
*/
export default function(options: PagingOptions) {
const next = new Subject<any>();
const prev = new Subject<any>();
const move = new Subject<number>();
const current = new BehaviorSubject<number>(options.startPage || 1);
const currentPage: Observable<number> = current
.map(inRangeOf(1, options.endPage))
.distinctUntilChanged();
const _next = next.withLatestFrom(currentPage, (_, page) => page).map((v) => v + 1);
const _prev = prev.withLatestFrom(currentPage, (_, page) => page).map((v) => v - 1);
const _move = move.map((v) => v /* noop */);
const percentString = currentPage.map(percentOf(options.endPage));
const currentSlide = currentPage.map((i) => options.slideElements[i - 1]);
Observable.merge(_next, _prev, _move).subscribe(current);
currentSlide.subscribe(function(current) {
options.slideElements.forEach(toInvisible);
current && toVisible(current);
});
return {
current : currentPage,
start : currentPage.filter((v) => v === 1),
end : currentPage.filter((v) => v === options.endPage),
changed : currentSlide,
percent : percentString,
next : next,
prev : prev,
move : move
};
}