A simple problem posted on Quora: What is the sum of all the even numbers from 2 to 42?
My J solution: a=:>:i.42 +/(-.2|a)#a 462 I'm sure this can be done in a single line using a hook or fork. but I'm not clear enough with the train rules to put this all together on a single line. Any suggestions? Skip Cave Cave Consulting LLC ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
