Rubies:
In the (sadly inferior) language Python, if you have an array like this…
a = [ 0, 1, 2, 3 ]
…you can change its dimensions without changing its contents (i.e.
efficiently) like this:
a.shape = [2, 2]
assert a == [ [1, 2], [3, 4] ]
What’s the equivalent in the (vastly superior) language Ruby? How does one
unflatten?
–
Phlip
http://andstuff.org/HarryPotter
– “He who has had, has been, but he who hasn’t been,
has been had” - Stanislaw Lem –
What’s the equivalent in the (vastly superior) language Ruby? How does one
unflatten?
How about ???
ruby flat.rb
[[1, 1, 1], [2, 2], [3, 3, 3, 3]]
cat flat.rb
class Array
def shape(*n)
data = self
res =
n.each do |count|
res << data.slice!(0, count)
end
res
end
end
p [1, 1, 1, 2, 2, 3, 3, 3, 3].shape(3, 2, 4)
On Sun, 25 May 2003 23:47:54 +0000, Phlip wrote:
–
Simon Strandgaard
Simon Strandgaard wrote:
How about ???
Stunning. Thanks.
But… 
…now I need help copying it from a KNode post running inside a
CygWin XFree86 fvwm2 X server, into WinXP’s clipboard so I can then paste
it into Scite. No lie.
Don’t worry. I’l figure this one out…
–
Phlip
greencheese.org
– Have a 
day –
Hi –
What’s the equivalent in the (vastly superior) language Ruby? How does one
unflatten?How about ???
ruby flat.rb
[[1, 1, 1], [2, 2], [3, 3, 3, 3]]cat flat.rb
class Array
def shape(*n)
data = self
res =
n.each do |count|
res << data.slice!(0, count)
end
res
end
end
p [1, 1, 1, 2, 2, 3, 3, 3, 3].shape(3, 2, 4)
That modifies the original array, though, which probably isn’t what’s
wanted.
Less impact-ful way:
class Array
def shape(*n)
i = 0
n.map {|e| s=i; i+=e; slice(s,e)}
end
end
David
On Mon, 26 May 2003, Simon Strandgaard wrote:
On Sun, 25 May 2003 23:47:54 +0000, Phlip wrote:
–
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web: http://pirate.shu.edu/~blackdav