Six new tasty functions for you

$:abs(x) - returns absolute value of number. If list is passed, then applies the function element by element.
$:floor(x) - returns floor of number. If list is passed, then applies the function element by element.
$:fpart(x) - returns fractional part of number. If list is passed, then applies the function element by element.
$:now() - returns number of milliseconds since midnight Jan. 1 1970
$:rrbzo() - returns a Random Real Between Zero and One.
$:sub(c, s[, e]) - returns a subcollection of a collection `c' with starting index `s' and ending index `e' if specified