From: SpringFlowers AutumnMoon <summercoolness@...>
Date: 2007-09-22T11:37:38+09:00
Subject: foo || 0 will cause exception but not for himself

if foo is undefined, it will throw exception when referred to... as in
try 1, 2, and 3 below.  However, it won't throw exception when assigned
to himself...  how is that interpreted?


irb(main):001:0> foo
NameError: undefined local variable or method `foo' for main:Object
        from (irb):1:in `Kernel#binding'

irb(main):002:0> foo || 0
NameError: undefined local variable or method `foo' for main:Object
        from (irb):2:in `Kernel#binding'

irb(main):003:0> bar = foo || 0
NameError: undefined local variable or method `foo' for main:Object
        from (irb):3:in `Kernel#binding'

irb(main):004:0> foo = foo || 0
=> 0

irb(main):005:0> foo
=> 0
-- 
Posted via http://www.ruby-forum.com/.