Question

Show how the list comprehension $[f \mathrm{x} \mid \mathrm{x}<-\mathrm{xs}, \mathrm{p}$ $x$ ] can be re-expressed using the higher-order functions map and filter.

   Show how the list comprehension $[f \mathrm{x} \mid \mathrm{x}<-\mathrm{xs}, \mathrm{p}$ $x$ ] can be re-expressed using the higher-order functions map and filter.

Programming in Haskell

Programming in Haskell

Graham Hutton 2nd Edition

Chapter 7, Problem 1

Instant Answer

Step 1

- $\mathrm{x}<-\mathrm{xs}$: This is the generator expression that iterates over the list $\mathrm{xs}$ and assigns each element to $\mathrm{x}$. - $\mathrm{p}$ $x$: This is the predicate $\mathrm{p}$ applied to each element $\mathrm{x}$. To re-express this using Show more…

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Show how the list comprehension $[f \mathrm{x} \mid \mathrm{x}<-\mathrm{xs}, \mathrm{p}$ $x$ ] can be re-expressed using the higher-order functions map and filter.

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