After extensive research, I'm still struggling to understand the distinction between pipe and map in Angular 7. Should we always include a pipe in Service.ts file in Angular 7?
Appreciate any clarification on this matter.
After extensive research, I'm still struggling to understand the distinction between pipe and map in Angular 7. Should we always include a pipe in Service.ts file in Angular 7?
Appreciate any clarification on this matter.
When working with rxjs 5.5 and later versions, operators on an observable can be used by piping them. The map operator is just one example of this within the pipe.
For instance in Newer Versions 5.5:
const example = source.pipe(map(val => val + 10), first());
In older versions of rxjs, there was no pipe keyword so multiple operators were combined using the dot (`.`) notation.
For example in Older Versions:
const example = source.map(val => val + 10).first();
RxJS library provides operators like map(), filter(), concat(), and flatMap() to manipulate data streams. To chain these operators together, you can use pipes in RxJS. Pipes enable you to merge multiple functions into a single function as shown below:
import { filter, map } from 'rxjs/operators';
const squareOddValues = pipe(
filter((num: number) => num % 2 !== 0),
map(num => num * num)
);
In simple terms, the pipe in RxJS is like a filter that allows you to modify the result using various RxJS operators before you receive it after subscribing. This way, you can customize the final output based on the logic operators you include in the pipe, such as map, tap, and more.
If you want to learn more about using RxJS with Angular, check out this guide: https://angular.io/guide/rx-library
For a comprehensive list of available operators, visit: https://www.learnrxjs.io/operators/
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