May 2018
Intermediate to advanced
512 pages
11h 3m
English
Content preview from Angular 6 for Enterprise-Ready Web Applications
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Adding search to weather service
So far, we have been passing parameters to get the weather for a city using its name and country code. By allowing users to enter zip codes, we must make our service more flexible to accept both types of inputs.
OpenWeatherMap's API accepts URI parameters, so we can refactor the existing getCurrentWeather function using a TypeScript union type and using a type guard, we can supply different parameters, while preserving type checking:
- Refactor the getCurrentWeather function in weather.service to handle both zip and city inputs:
app/src/weather/weather.service.ts getCurrentWeather( search: string | number, country?: string ): Observable<ICurrentWeather> { let uriParams = '' if (typeof search === 'string') ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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