ruby statement modifier local variables

July 8th, 2008 •
tags: irb, ruby

irb(main):001:0> puts foo if foo = "foo"
(irb):1: warning: found = in conditional, should be ==
NameError: undefined local variable or method `foo' for main:Object
from (irb):1

irb(main):002:0> puts foo if(foo = "foo")
(irb):2: warning: found = in conditional, should be ==
foo
=> nil
irb(main):003:0>