Category: Software Design
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Algebraic Effects: From Callbacks and Promises to Effect Handlers
Decoupling computation from the interpretation of its effects Introduction There is a moment in programming that almost every developer recognizes. A piece of code begins as a simple sequence of ideas: take a value, transform it, return a result. At that stage, everything feels local, direct, and easy to follow.…
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Incremental Modernisation of Legacy Software Systems
Patterns and Strategies to Prevent Entropy, Regression, and Systemic Fragility Introduction Modernizing legacy systems isn’t about throwing everything away and starting fresh. It’s about evolving systems incrementally, safely, and under real production constraints. While targeted rewrites can be necessary, treating modernization as a single “Big Bang” replacement project introduces critical…
