> whereas today the decision is often directed by > "what is standard?". With this solution we wouldn't have had the FiniteMap > break, we could choose more equally between different data structure > collections (say Edison vs. GHC libs), monad libraries, and so on.
this is a good point..."blessing" one library can have a chilling impact on interesting alternatives. the exception i would make here is when you are coding to a known interface or protocol, in which case the matching the spec largely defines the coding exercise.
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