From: jake kaiden <jakekaiden@...>
Date: 2011-10-11T20:52:35+09:00
Subject: Re: why does `a + f b` not parse?

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

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