[Edu-sig] The Great Computer Language Shootout

[Luby Liao]

Dustin and Kirby, thank you for the insight.  cheers, Luby 

 > On Sun, 3 Jun 2001, Luby Liao wrote:
 > 
 > Here's a better way to pass extra variables to a lambda, without globals:
 > 
 > def compose(f,g):
 >   return lambda x,_f=f,_g=g : _f(_g(x))
 > 
 > That is the closest to a lambda binding you're going to get.  Python
 > doesn't automatically slurp up local variables when it creates a lambda,
 > but it can be easily simulated using default arguments, as above.
 > 
 > I read about this in an article -- I think by Guido -- a while ago, but I
 > don't have time to look it up right now.
 > 
 > Enjoy.
 > 
 > Dustin
 > 
 > > How about:
 > > 
 > >   def compose(f,g):
 > >       global _f, _g
 > >       _f = f
 > >       _g = g
 > >       return lambda x: _f(_g(x))
 > > 
 > >   if __name__ == '__main__':
 > >       from math import *
 > >       print compose(sin, sqrt)(3)
 > >       print sin(sqrt(3))
 > > 
 > >     0.98702664499
 > >     0.98702664499
 > > 
 > > 
 > > cheers, Luby 
 > > 
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 > 
 > ---------------------------------------------------------------------
 > | Dustin Mitchell                                        )O(        |
 > ---------------------------------------------------------------------