Re^3: Pi golf:

[truedfx]

Actually, map doesn't save any space (nor does it cost any):

$s+=6/$_**2for 1..1e6;die$s**.5
map$s+=6/$_**2,1..1e6;die$s**.5

[liverpole]

You're right... good observation.

I still think it looks better, though, because it lets you omit the space after the for, even though that gets replaced with the ','.