ARCHIVE · 09
Follow the trail from foundational concepts to practical engineering decisions.
From what Codable synthesis actually generates to standard fixes for key mismatches, date formats, nested structures, and partial failures—and DecodingError debugging.
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For legacy code, characterization tests that lock in current behavior come before refactoring. This guide lays out the practical sequence for using seams to isolate code that cannot be tested because of dependencies.
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RIBs split an app by business logic rather than screens. This article explains the premise of viewless components, why RIBs suit only very large organizations, and how they differ from VIPER.
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The five functions map·filter·compactMap·flatMap·reduce differ by what the closure returns. This guide covers when to choose them over for loops, the intermediate arrays created by chaining, and the problems lazy sequences solve.
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In Swift 5.5 and later, declare test functions as async, await the result, and then verify it. This guide also covers error validation, testing legacy callback APIs, and when expectations are still needed.
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