theAIcatchup

Illustration of JavaScript call stack with execution contexts and scope chain diagram

JavaScript's Hidden Execution Contexts: Why Your Code Ghosts You

Staring at a JavaScript bug that makes no sense? It's not you. It's execution contexts pulling strings behind the scenes.

3 min read 2 hours ago

Swift closure with @Sendable crossing actor isolation boundaries

Programming Languages

Swift's @Sendable: The Passport Closures Need for Concurrency Chaos

Swift promised concurrency nirvana with actors and async/await. But closures? They were smuggling unsafe state across domains. @Sendable slams the door on bugs.

4 min read 3 hours ago

#closures

JavaScript's Hidden Execution Contexts: Why Your Code Ghosts You

Swift's @Sendable: The Passport Closures Need for Concurrency Chaos

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