Yan Cui
I help clients go faster for less using serverless technologies.
This article is brought to you by
Don’t reinvent the patterns. Catalyst gives you consistent APIs for messaging, data, and workflow with key microservice patterns like circuit-breakers and retries for free.
Yet another extension method to combine two observable collections, this time we have IObservable<T>.Concat which is very similar to IObservable<T>.Merge, but crucially, when you concatenate one observable collection to another, the subscription to the second observable collection happens after the first had completed! Here’s a quick illustration of how the two methods differ:
As you’ve probably guessed already, the Concat method requires the observable collections to be merged to be of the same type.
Again, you can either invoke it as an extension method:
var zs = xs.Concat(ys);
or you can invoke it as static method on more than two observable collections:
var zs = Observable.Concat(xs, ys, us, vs);
Whenever you’re ready, here are 3 ways I can help you:
- Production-Ready Serverless: Join 20+ AWS Heroes & Community Builders and 1000+ other students in levelling up your serverless game. This is your one-stop shop for quickly levelling up your serverless skills.
- I help clients launch product ideas, improve their development processes and upskill their teams. If you’d like to work together, then let’s get in touch.
- Join my community on Discord, ask questions, and join the discussion on all things AWS and Serverless.