To me, this one looks more succinct, if a bit too much on one line ;-) But, to take this a bit further, I look at postfix "if" as "grep" ... 

print map {
  "$_\n"
} grep {
  $_ == sum map { $_ ** 3 } split //
} 100 .. 999

[download]
IMO, both better (more whitespace) and worse (hiding the loops, removal of parenthesis for the sum function). ;-) (I'm sure others have their own opinions of how they compare.)

Just to make it a bit worse ... 

print "$_\n" for grep {
  $_ == sum map $_ ** 3, split //
} 100 .. 999

[download]
Or is that better? Hmmm...

In reply to Re^2: Cube/digit script. by Tanktalus
in thread Cube/digit script. by Andrew_Levenson

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