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[v3] Implement new Concept Exercise: reduce #418

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wneumann opened this issue Jun 18, 2020 · 1 comment
Open

[v3] Implement new Concept Exercise: reduce #418

wneumann opened this issue Jun 18, 2020 · 1 comment

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@wneumann
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This issue describes how to implement the reduce concept exercise for the Swift track.

Getting started

Please please please read the docs before starting. Posting PRs without reading these docs will be a lot more frustrating for you during the review cycle, and exhaust Exercism's maintainers' time. So, before diving into the implementation, please read the following documents:

Please also watch the following video:

Goal

This concept exercise should convey a basic understanding of how to use reduce in Swift.

Things to teach

  • What is reduce?
  • Sequence.reduce
  • Sequence.reduce(into:_:)

Things not to teach

  • Other higher-order functions

Concepts

  • reduce

Prerequisites

  • functions
  • higher-order-functions
  • closures
  • loops

Resources to refer to

Hints

After

Representer

TBD

Analyzer

TBD

Implementing

See the Swift track implementation guide for guidance.

Help

If you have any questions while implementing the exercise, please post the questions as comments in this issue.

@wneumann
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Considering merging this and flat-map into map, especially if compactMap gets moved to filter. The concepts are all related, so I am trying to come up with the best arrangement that doesn't overload the student but also that doesn't make the exercise too thin.

@nicolechalmers nicolechalmers changed the title [Swift] Implement new Concept Exercise: reduce [v3] Implement new Concept Exercise: reduce Jan 28, 2021
@nicolechalmers nicolechalmers transferred this issue from exercism/v3 Jan 28, 2021
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