Add lens-person Haskell-specific exercise #97
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kytrinyx
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Add lens-person Haskell-specific exercise
ErikSchierboom
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At the time it was added (#97), indeed [Haskell][haskell] was the only implementing track, and it was marked Haskell-specific. However, the [Scala][scala] track has also implemented this exercise. I predict it is confusing for Scala students to see "Haskell specific" in the list of the Scala exercises. The proposal is to change it to "specific to languages with immutable data". [haskell]: exercism/haskell#84 [scala]: exercism/scala#157 Lenses can be a fit for any language that has immutable data and data structures that can be nested. In such a language, updating a deeply-nested field can be a lot of work, but made easier with lenses. This exercise demonstrates the use of lenses and is applicable to **any** language with immutable data, not just Haskell. The alternative considered was to use "functional programming" specific, but the term "functional programming" is a little too broad. It's altogether possible that a functional programming language could have mutable data and a non-functional programming language could have immutable data, so let's be precise about where lenses are helpful. As of this writing, I do not believe any other exercise is language-specific. Questions to this effect have been asked in: * #352 * exercism/exercism#3113 If you are curious about having language-specific exercises, you may be interested in exercism/DEPRECATED.trackler#22.
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See exercism/haskell#84.