From: "Firestone, Mark - Technical Support" <mark.firestone@...>
Date: 2002-08-12T18:08:06+09:00
Subject: RE: Fun with shifting bytes / Python translation

Thanks for your help!  That fixed it.  The rest of the math was
straight-forward to port.  Now back to the QWK/REP import routine..

Mark



-----Original Message-----
From: angus@quovadis.com.ar [mailto:angus@quovadis.com.ar]
Sent: 08 August 2002 10:50
To: ruby-talk@ruby-lang.org
Subject: Re: Fun with shifting bytes / Python translation


[...]
> I don't understand how lamba or reduce work, for instance.
[...]
> 	    L=map(lambda x: ord(x), L[0:4])
> 	    L.reverse()
> 	    n=reduce(lambda x,y: x*256+y, L, 0L)

I don't know about the math, but with regard to the lambdas, I suppose the
first creates an array containing the byte values of the string:

    l = l.split(//).map{ |c| c[0] }
    l.reverse!

and the second could be something like this:

    n = 0
    l.each {|i| n = n*256+i }

But I really don't know Python.

Good luck.

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