88 lines
2.5 KiB
Markdown
88 lines
2.5 KiB
Markdown
# Bob
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Welcome to Bob on Exercism's Haskell Track.
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If you need help running the tests or submitting your code, check out `HELP.md`.
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## Instructions
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Bob is a lackadaisical teenager. In conversation, his responses are very limited.
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Bob answers 'Sure.' if you ask him a question, such as "How are you?".
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He answers 'Whoa, chill out!' if you YELL AT HIM (in all capitals).
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He answers 'Calm down, I know what I'm doing!' if you yell a question at him.
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He says 'Fine. Be that way!' if you address him without actually saying
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anything.
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He answers 'Whatever.' to anything else.
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Bob's conversational partner is a purist when it comes to written communication and always follows normal rules regarding sentence punctuation in English.
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You need to implement the `responseFor` function that returns Bob's response
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for a given input. You can use the provided signature if you are unsure
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about the types, but don't let it restrict your creativity:
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```haskell
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responseFor :: String -> String
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```
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To solve this exercise you may read up on:
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- [Guards][guards]
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[guards]: https://www.futurelearn.com/courses/functional-programming-haskell/0/steps/27226
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This exercise works with textual data. For historical reasons, Haskell's
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`String` type is synonymous with `[Char]`, a list of characters. For more
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efficient handling of textual data, the `Text` type can be used.
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As an optional extension to this exercise, you can
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- Read about [string types](https://haskell-lang.org/tutorial/string-types) in Haskell.
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- Add `- text` to your list of dependencies in package.yaml.
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- Import `Data.Text` in [the following way](https://hackernoon.com/4-steps-to-a-better-imports-list-in-haskell-43a3d868273c):
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```haskell
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import qualified Data.Text as T
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import Data.Text (Text)
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```
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- You can now write e.g. `responseFor :: Text -> Text` and refer to `Data.Text` combinators as e.g. `T.isSuffixOf`.
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- Look up the documentation for [`Data.Text`](https://hackage.haskell.org/package/text/docs/Data-Text.html),
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- You can then replace all occurrences of `String` with `Text` in Bob.hs:
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```haskell
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responseFor :: Text -> Text
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```
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This part is entirely optional.
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## Source
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### Created by
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- @etrepum
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### Contributed to by
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- @austinlyons
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- @cmccandless
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- @danbst
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- @eijynagai
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- @hritchie
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- @iHiD
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- @jrib
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- @Kobata
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- @kytrinyx
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- @petertseng
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- @ppartarr
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- @rbasso
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- @sshine
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- @tejasbubane
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- @tofische
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### Based on
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Inspired by the 'Deaf Grandma' exercise in Chris Pine's Learn to Program tutorial. - http://pine.fm/LearnToProgram/?Chapter=06 |