Rosetta Code
Stumbled across the Rosetta Code site this morning. I can’t remember when I last discovered a site so unbelievably useful; especially for people like me who occasionally dip into languages and then don’t use them again for a long time.
Rosetta Code is a programming chrestomathy site. The idea is to present solutions to the same task in as many different languages as possible, to demonstrate how languages are similar and different, and to aid a person with a grounding in one approach to a problem in learning another. Rosetta Code currently has 504 tasks, and is aware of 384 languages, though we do not (and cannot) have solutions to every task in every language.
A very good example from the site:
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