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import {Observable,Observer} from "rxjs";
let numbers = [1,5,10];
let source = Observable.from(numbers);

class MyObserver implements Observer<number>{
    next(value){
        console.log(`value:${value}`);
    }

    error(e){
        console.log(`error: ${e}`);
    }

    complete(){
        console.log("complete");
    }
}

source.subscribe(new MyObserver());
source.subscribe(new MyObserver());