"5-line" engine

[JRace]

To each his own.

James wanted to see what he could accomplish in 5 lines.  I think that such self challenges are good.  They can force a person to think creatively, to see how much they can accomplish within their arbitrarily chosen constraints.

Sure, all those colons may be stretching (or breaking) the rules in some peoples' minds, but in coding challenges rules are made to be stretched.  It's all in fun.