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Line 294: : The most commons definition you'll find in the literature is that functions can be passed as arguments (higher-order functions, downwards funarg problem) and returned and stored as values (upwards funarg problem). : Now I've thought about it bit more, related to the your question is the concept of function equality (intentional equality vs. extensional equality vs. ad-hod equality). Its not directly related to first-classness, but as you raised it in this context it might be useful to discuss in the article. —''[[User:Ruud Koot\|Ruud]]'' 10:01, 17 February 2011 (UTC)

Talk:First-class function: Difference between revisions