luhn-generator/update/node_modules/rxjs/_esm2015/internal/observable/defer.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

import { Observable } from '../Observable';
import { from } from './from';
import { empty } from './empty';
export function defer(observableFactory) {
    return new Observable(subscriber => {
        let input;
        try {
            input = observableFactory();
        }
        catch (err) {
            subscriber.error(err);
            return undefined;
        }
        const source = input ? from(input) : empty();
        return source.subscribe(subscriber);
    });
}
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