Sallar Kaboli / Exploring JavaScript & Things.

I started refactoring Buttercup’s UI about 8 months ago I had no idea how difficult it’s going to be. Why I Refactored Back in 2015 when Perry and I started making Buttercup, I decided to use BackboneJS for coding the front-end part of things, and it went well for a while. But I quickly realized BackboneJS is not suitable for what Buttercup wants to achieve. Backbone does not scale well in large applications IMO. To name a few issues we had: Very manual way of rendering and re-rendering. Rendering in BackboneJS is done by replacing the dom contents manually using a jQuery method ($(...).htm

Recently I went to a technical interview in a big tech company for the front-end engineering role. Regardless of how I feel about their process and how unrelated the test was to the job, I found one of the questions interesting and thought it would be nice if I post my solution here. Here’s the problem: There is an elevator in a building with M floors. This elevator can take a max of X people at a time or max of total weight Y. Given that a set of people and their weight and the floor they need to stop, how many stops has the elevator taken to serve all the people? Consider the elevator se