range slicing

[kuba]

Hi everyone,
This is my first post here :)
In order to get a slice of a range (to access some initial 
elements) I have to convert a range into array first. I wonder 
what is preferred approach? Should I use slicing or stick with 
for loops? Also turning the range into array forces the range to 
be computed entirely, killing the lazy nature of the dirEntries 
function. Could it be a bottleneck down the road?

auto dir = "/data/home/kuba";
auto dirs = dirEntries(dir,SpanMode.shallow);
auto arr =  array(dirs);
writeln(arr[2..4]);

Thank you,
kuba