Merging branches is fundamental for integrating feature work, bug fixes, and collaborative contributions into the main codebase in Git workflows. As the creator of CoreUI, a widely used open-source UI library, I’ve merged thousands of branches from contributors worldwide, managing feature integration and release cycles across multiple repositories. From my expertise, the most standard approach is to use git merge command after switching to the target branch. This method creates merge commits that preserve the history of both branches, enabling clear tracking of feature integration and easy rollback if needed.

Merging arrays is essential when combining data from multiple sources, concatenating user selections, or building unified datasets in JavaScript applications. With over 25 years of experience in software development and as the creator of CoreUI, I’ve implemented array merging extensively in components like multi-select filters, data aggregation systems, and navigation builders where multiple arrays need to be combined. From my extensive expertise, the most modern and efficient solution is using the ES6 spread operator, which creates a new array without mutating the original arrays. This approach is clean, readable, and performs well for most use cases.