From: Rick DeNatale on 14 Dec 2009 09:28
On Mon, Dec 14, 2009 at 4:59 AM, Bertram Scharpf
> Am Montag, 14. Dez 2009, 16:05:54 +0900 schrieb Ruby Newbee:
>> Oh sorry I have found that.
>> need to convert the arguments to an array.
>> "Hello, %s %s" %(["Matz!","again"])
>> => "Hello, Matz! again"
> Be aware that % is interpreted as an operator because of the
> string in front of it. There is also a shortcut
> which would be a string.
Actually, I'm not sure how that % before the ( is being seen by the parser.
For either Ruby 1.8.6 or 1.9.
%( should interpret everything up to the the matching ) as part of a
string including the "'s and the , I'm not sure why it doesn't do the
same thing as:
> "Hello, %s %s" % "\"Matz!\",\"again\""
ArgumentError: too few arguments
from (irb):3:in `%'
Since the format string needs two substitutions and we are only giving it one.
Perhaps a subtle Ruby parsing/lexing bug.
> What you do is applying the mod(%) operator to a string:
> str % array
> "%s %d %f" % [ "hi", 33, 0.618] #=> "hi 33 0.618000"
No, this is sending the message % to the string. String#% is NOT mod,
the documentation (informally calls it format) and directs you to
Kernel#sprintf for further explanation.
Other that sharing the name :'&' with the methods in the various
Numeric subclasses, there's no meaning of mod.