one-liner wars

A game popular among {hackers} who code

in the language {APL} (see {write-only language} and {line

noise}). The objective is to see who can code the most

interesting and/or useful routine in one line of {operators}

chosen from APL's exceedingly {hairy} primitive set. A

similar amusement was practiced among {TECO} hackers and is

now popular among {Perl} aficionados.

{Ken Iverson}, the inventor of APL, has been credited with a

one-liner that, given a number N, produces a list of the prime

numbers from 1 to N inclusive. It looks like this:

(2 ◦ 0 :.◦ T o.| T) / T <- iN

where "o" is the APL null character, the assignment arrow is a

single character, and "i" represents the APL iota.

[{Jargon File}]

(2000-03-19)