_min

Produces the least of the received values -- Function

Anything -> _min (exp) -> The same Type

Receives: A List of any sort
exp (optional): An optional expression to apply to each received value
Produces: The lowest of the received values

In its simple form, with no parameters, _min takes a List of values, and produces whatever is least from them:

<7, 28, 3, 5, 108> -> _min

produces 3.

The more interesting and common usage, however, takes one parameter, which is an expression. This applies the received values (usually Things) to that expression, and produces the one that had the lowest result:

All Games -> _min(Price)

produces the Game with the lowest Price.

You can get a similar result by using _sort and taking the first value of the results, but _min is much, much faster, and should be used instead when possible.