ngrx

问题 I have an Angular 8 application that uses the Angular Material MatSnackBar and I am trying to test that the open() method of the class is called. The call to the open() method is within the body of an NgRx store selector, like this: ngOnInit() { this.store.dispatch(fromStore.getFeaturedPlaylists()); this.subscription = this.store.pipe( select(fromStore.selectError), filter(err => !!err), switchMap((err) => this.snackBar.open( `Error: ${err.message}`, 'Try again', {duration: 5000})

问题 I am reading ngrx docs and stumbled upon such a code. What do [p in keyof T] and T[p] mean? export type ActionReducerMap<T, V extends Action = Action> = { [p in keyof T]: ActionReducer<T[p], V> }; 回答1: That is a mapped type. You can read about them in the typescript docs here, or in this blog post. Basically, the syntax [p in keyof T] means just that; p is one of the keys of the object T . Then, the T[p] just represents the type of that key's value. Read those two links for a more robust

问题 I am reading ngrx docs and stumbled upon such a code. What do [p in keyof T] and T[p] mean? export type ActionReducerMap<T, V extends Action = Action> = { [p in keyof T]: ActionReducer<T[p], V> }; 回答1: That is a mapped type. You can read about them in the typescript docs here, or in this blog post. Basically, the syntax [p in keyof T] means just that; p is one of the keys of the object T . Then, the T[p] just represents the type of that key's value. Read those two links for a more robust

问题 I am reading ngrx docs and stumbled upon such a code. What do [p in keyof T] and T[p] mean? export type ActionReducerMap<T, V extends Action = Action> = { [p in keyof T]: ActionReducer<T[p], V> }; 回答1: That is a mapped type. You can read about them in the typescript docs here, or in this blog post. Basically, the syntax [p in keyof T] means just that; p is one of the keys of the object T . Then, the T[p] just represents the type of that key's value. Read those two links for a more robust

问题 I have the problem with update chart js in angular. I am using for it ngrx store. In selector subscriber (run in ngOnInit) I tried update the chart data: this.yrSubscription = this.userDataStore.pipe(select(selectYrReport)) .subscribe(el => { el.sessions.forEach(item => { this.datasetsSessions[0].data.push(+item); }); }); And my chart data: datasetsSessions: ChartDataSets[] = [{ label: 'Sessions', data: [], fill: false }]; Register charts: private _registerCustomChartJSPlugin(): void {

问题 I have the problem with update chart js in angular. I am using for it ngrx store. In selector subscriber (run in ngOnInit) I tried update the chart data: this.yrSubscription = this.userDataStore.pipe(select(selectYrReport)) .subscribe(el => { el.sessions.forEach(item => { this.datasetsSessions[0].data.push(+item); }); }); And my chart data: datasetsSessions: ChartDataSets[] = [{ label: 'Sessions', data: [], fill: false }]; Register charts: private _registerCustomChartJSPlugin(): void {

来源： https://stackoverflow.com/questions/64500500/combining-multiple-conditional-observables-for-preparing-the-data

来源： https://stackoverflow.com/questions/64500500/combining-multiple-conditional-observables-for-preparing-the-data

来源： https://stackoverflow.com/questions/64500500/combining-multiple-conditional-observables-for-preparing-the-data

来源： https://stackoverflow.com/questions/64500500/combining-multiple-conditional-observables-for-preparing-the-data