Re: Optional arguments and default values
On Sat, 31 Dec 2005 12:58:14 -0000, Robert Klemme <bob.news@xxxxxxx> wrote:
Ross Bamford <rosco@xxxxxxxxxxxxxxxxxxxxxx> wrote:
Maybe:
def foo(*args)
args.empty? && "qwerty" or args.inject(0) { |s,i| s * i }
end
or:
def foo(*args)
if args.empty?
"qwerty"
else
args.inject(0) { |s,i| s * i }
end
end
The implementation of Enumerable#inject allows for an even more elegant
solution
def foo(*args)
args.inject {|a,b| a*b} || "qwerty"
end
foo 2,3,5
=> 30
foo 2,3
=> 6
foo 2
=> 2
foo
=> "qwerty"
Note: if args is empty this inject returns nil, if there is just one
element that is returned.
Cool, I didn't know that, thanks for pointing it out :)
Cheers,
--
Ross Bamford - rosco@xxxxxxxxxxxxxxxxxxxxxx
.
