From: Joe Van Dyk <joevandyk@...>
Date: 2006-03-04T07:47:00+09:00
Subject: Re: Python for Ruby programmers

On 3/3/06, Joe Van Dyk <joevandyk@gmail.com> wrote:
> Hi,
>
> I need to write a GUI for a vanilla RHEL3 box (with no extra software
> installed on it).  I figure Python / pygtk2 is a good choice for this,
> as it's installed by default.  (Ruby is 1.6.8 on that box, and
> ruby-gnome2 isn't installed).  The GUI will do various RPM-related
> things -- it's a program that will examine a machine's configuration
> and figure out what additional RPMs need to be installed before a user
> can run our software.
>
> I don't know much python, although I did write a small program in it a
> few years ago.  Any pointers on where I could get a quick introduction
> to it?  I don't need an introduction to programming, I need an
> introduction to Python (and preferably from a Rubyist POV).

What's the Ruby equivalent of this?

for f in filter(lambda f: f(-1)>=f(1),
                [lambda x:x, lambda x:x**2, lambda x:x**3]):
    for x in range(-10, 11):
        print x, f(x)