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[RxJS] `add` Inner Subscriptions to Outer Subscribers to `unsubscribe` in RxJS

When subscribers create new "inner" sources and subscriptions, you run the risk of losing control of them when the outer subscriber unsubscribes. This is handled easily enough if you use the add method from the Subscriber class to add the "…

[RxJS] Add debug method to Observable in TypeScript

Observable.prototype.debug = function(message: any) { return this.do( (next) => { if(!environment.production) { console.log(message, next); } }, (err) => { if(!environment.production) { console.error(message, err) } }, () => { if(!environment.pro…

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[RxJS + AngularJS] Sync Requests with RxJS and Angular

When you implement a search bar, the user can make several different queries in a row. With a Promise based implementation, the displayed result would be what the longest promise returns. This is the problem which we want to solve. <!DOCTYPE html> &…

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[Angular 2] Managing State in RxJS with StartWith and Scan

The scan operator in RxJS is the main key to managing values and states in your stream. Scan behaves just as a reduce function would, but scan is able to collect values from streams over time. This lesson covers using startWith to set the initial acc…