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Concurrency · medium

25. Context

Deadlines, cancellation and request scope.

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context.Context carries cancellation signals, deadlines and request-scoped values through call chains. Pass it as the first parameter, honour ctx.Done() in loops and blocking calls, and derive child contexts with WithTimeout or WithCancel.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
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Check your understanding

  1. 1. Context should be passed as…

  2. 2. Which channel reports cancellation?

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