From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2011-10-11T23:17:15+09:00
Subject: Re: why does `a + f b` not parse?

Yes, I think we all know that; the question is, why does 2 + sqrt(5)
parse, but 2 + sqrt 5 does not? I've been wondering this myself - is
that syntax somehow ambiguous?

2011/10/11, jake kaiden <jakekaiden@yahoo.com>:
> Phillip Gawlowski wrote in post #1026042:
>
>> (remember: + is a method, not an operator!)
>>
>> That this is a mathematical expression is coincidental
>
>   this is a very important point in ruby... `+` is a method (and not an
> operator, as Phillip pointed out,) that behaves differently with various
> classes, including but not limited to Integers, Strings, and Arrays -
> check out the following...
>
>
> irb(main):001:0> p 2 + 5
> 7
> => nil
> irb(main):002:0> p "two" + "five"
> "twofive"
> => nil
> irb(main):003:0> a1 = ["one", "two", "three"]
> => ["one", "two", "three"]
> irb(main):004:0> a2 = [4, 5, 6]
> => [4, 5, 6]
> irb(main):005:0> p a1 + a2
> ["one", "two", "three", 4, 5, 6]
> => nil
>
>
>   - j
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


-- 
-- Matma Rex