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re: Very nice article, just two small tips: There is not really any reason to write a custom Eq instance ever, just derive it You could shorten your ...
 

Thanks Jan! That list comprehension is really readable. I’ll be sure to play with that and practice. Coming from a largely-JS/Ruby background, list comprehensions are definitely something I have to further internalize.

Thanks for noting the Eq derivation as well. Actually after writing this, I re-read that chapter of Learn You A Haskell and realized the same. I’ll update my source and leave an edit in this article.

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