list.without()?

[Christian Tismer]

"Magnus L. Hetland" wrote:
> 
> "Mike Fletcher" <mcfletch at vrtelecom.com> writes:
> 
> > Well...
> >
> > def without( source, element):
> >       temp = source[:]
> >       while temp:
> >               try:
> >                       temp.remove( element )
> >               except:
> >                       break
> >       return temp
> 
> Whoa!
> 
> Why on *earth* would you use a while/try/break-combination? IMO a much
> more natural solution would be:
> 
> def without(source, element):
>     result = source[:]
>     if element in result:
>         result.remove(element)
>     return result

But that would be wrong.
"Without" means "there is no such object in it", while list.remove
removes the first occourance of an object.

Mike's implementation appears to be very cheap, since through
the try..except clause, he can combine removal with test
for existance.

ciao - chris

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