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- Welcome to Lesson 4: Decoupling.

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You are not allowed to start here,

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I really need you to have looked

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at those first three
lessons before we get here,

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because everything
happens in the concrete,

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and that's what decoupling is about,

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decoupling the concrete.

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So to appreciate decoupling
mechanics and semantics,

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we've gotta know and learn our concrete.

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So in this section,

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we're gonna learn how we can create

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thin layers of decoupling
that are precise.

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We're also gonna learn the cost

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and the impact that decoupling
has on your Go programs,

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because what I want is
to minimize pollution

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and be able to maximize the advantages

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that decoupling gives us in our software,

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both in terms of design and architecture,

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and include the cost of
what decoupling brings.

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We wanna minimize these things,

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and we're gonna learn those
things in this section.