@davetchepak Here is a related challenge. Implement the SpaceSaving algorithm http://www.cs.ucsb.edu/research/tech_reports/reports/2005-23.pdf … in a purely functional style.
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@dibblego@davetchepak Absolutely, but I like to avoid UnsafePerformIO and RunST if there is another solution without them.
@headinthebox @davetchepak unsafe* is another thing altogether. avoid ST for what? var? lolvar?