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Chapter 11 - sumArrayWriter #472

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Chapter 11 - sumArrayWriter#472

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@mkohlhaas
mkohlhaas
opened on Nov 13, 2024

No-peek solution is too convoluted. Alternative solution:

sumArrayWriter ∷ Array Int → Writer (Additive Int) Unit
sumArrayWriter = traverse_ (\n → tell $ Additive n)

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