Is it worth using UI Libraries for React Native, or should one write stuff from scratch? The documentations keep deprecating with the amount of development going on in the community.

How should I select a technology stack for my startup?

I am starting a new Startup by myself and have good knowledge about mobile app development. I am trying to make a transaction(buying and selling) product. What are things you see when selecting a technology stack for your product? What are the best p...

How do I build a face detection program in Java/Android?

I want to compare two different pictures of a person, and check if both of the person are same. Is there any cloud service or native framework available?

What are the differences between "waterfall", and "series", methods in the NodeJS async library?

I am just getting started with the async npm package to re-write, and then extend some code that is rotting in callback hell; just came here, to know if anyone can quickly give me a difference between the async.waterfall, and async.series methods; bo...

I am a good programmer, but not very good at Algorithms. How should I improve my algorithm knowledge?

When I go to interviews I am always able to solve the technical problems. But one thing I lack is : Knowledge of algorithms and Datastructures. What can I do in order to get better? Are there any books or video tutorials that will help me?

What do you mean by Observables?

When I googled for it, I was taken to pages like CycleJS, RxJS etc. It's still unclear to me what Observables are, how they can be used in JavaScript and what's the benefits etc. Could someone please be generous enough to give me an overview here?