I found this J example on StackOverflow. 43 characters, excluding name, assignment operator, and optional whitespace. quicksort =: (($:@(<#[) , (=#[) , $:@

I found this J example on StackOverflow. 43 characters, excluding name, assignment operator, and optional whitespace. quicksort =: (($:@(<#[) , (=#[) , $:@(>#[)) ({~ ?@#)) ^: (1<#) http://stackoverflow.com/questions/2603739/what-is-the-most-concise-programming-language http://stackoverflow.com/questions/2603739/what-is-the-most-...