From: Martin DeMello <martindemello@...>
Date: 2004-09-23T19:34:38+09:00
Subject: Re: String#pad  ?

Jani Monoses <jani@iv.ro> wrote:
> Hello
> 
> is there a nicer way of padding a string to a power of two length than for example
> 
> data = data.ljust((data.length+3) & ~3)
> 
> this looks too much like C :)

And doesn't even work :)

class Fixnum
  def lg
    self.to_s(2).length - 1
  end
end

class String
  def ljust_pow2
    self.ljust(2 ** (self.length.lg + 1))
  end
end

p "hello world".ljust_pow2

martin