Recent snippets posted on Snipplr.com https://snipplr.com/ Tue, 09 Jun 2026 17:47:32 +0000 https://snipplr.com/view/6067/grouping-keys-of-an-associative-list <p>Given an an associative list ((k1 . v1) (k2 . v2) ... (kn . vn)), with possibly equal values for ki, it returns another alist where all cells have distinct keys and where values originally associated to the same key have been grouped as a list in the new cons cell. Ouch! This is much harder to explain than to code. Just check the commented example in the code.</p> Wed, 30 Apr 2008 14:23:31 UTC https://snipplr.com/view/6067/grouping-keys-of-an-associative-list