Understanding the Elevator Logic in JavaScript: Why Isn’t the Closest Elevator Chosen? скачать в хорошем качестве

Understanding the Elevator Logic in JavaScript: Why Isn’t the Closest Elevator Chosen?

Dive into the intricacies of elevator selection logic in JavaScript! Learn why your code isn't picking the closest elevator and how to fix it. --- This video is based on the question https://stackoverflow.com/q/62543183/ asked by the user 'Olivier Godbout' ( https://stackoverflow.com/u/13716287/ ) and on the answer https://stackoverflow.com/a/62545407/ provided by the user 'JEQP' ( https://stackoverflow.com/u/11973670/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: What Am I doing wrong with my number of elevators loop? Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Understanding the Elevator Logic in JavaScript: Why Isn’t the Closest Elevator Chosen? When building applications that simulate real-world scenarios, it's crucial that the underlying logic closely resembles reality. One particular challenge many developers face is how to effectively choose the closest elevator in a building simulation. In this post, we’ll explore a real-world coding query about elevator selection and break down how to improve the elevator selection logic so it behaves as expected. The Problem: Elevator Selection Loop Issue This post tackles a specific issue in a JavaScript elevator simulation. The developer has created a Column class that is meant to manage elevators in a building with multiple floors. The question arose when a scenario was tested, and it became apparent that the logic used to select the best elevator wasn't functioning as intended. Here’s a quick summary of the issue: The developer expected their code to choose the closest elevator to answer a user's request. However, it incorrectly selected a more distant elevator instead. The key function in question is called findElevator, which is tasked with finding the most suitable elevator in response to a user request. The Code Breakdown Let’s take a closer look at the relevant sections of the findElevator method responsible for selecting the elevator. [[See Video to Reveal this Text or Code Snippet]] Why is the Closest Elevator Not Being Chosen? Condition Order Matters: The primary reason the algorithm isn't working as expected is due to the order of the conditions within the loop. The code checks if an elevator is moving in the requested direction or if it is idle before considering other factors like distance. Idle Elevators Priority: When the code encounters an idle elevator, it immediately sets it as the bestElevator, skipping any comparison of which elevator is closer. Improving the Elevator Selection Logic To address this problem, adjustments can be made to ensure that elevators that are moving are prioritized properly and that the closest elevator is chosen when no elevators are actively moving. Here's how to do this: Step 1: Identify Active Elevators First Instead of immediately setting an idle elevator as the bestElevator, we first want to check if there are any elevators in motion. [[See Video to Reveal this Text or Code Snippet]] Step 2: Compare Active Elevators First After identifying active elevators, iteratively check if any of them can serve the request based on direction. If none can fulfill the request, then check idle elevators. [[See Video to Reveal this Text or Code Snippet]] Conclusion By implementing this change, you ensure that all elevators are considered accurately without prematurely prioritizing idle elevators. This approach effectively resolves the issue of selecting the closest elevator to fulfill the user’s request. In this scenario, the key takeaway is the importance of the order and logic of your conditions when making decisions based on multiple factors. Through thoughtful restructuring, developers can create more intuitive and effective software models. Feel free to reach out if you have any more questions regarding this or related topics!