From: Sarah Allen <sarah@...>
Date: 2010-04-14T08:24:06+09:00
Subject: I thought spaces didn't matter around operators

I had understood that operators, like minus (-), had special "syntactic
sugar" that allowed me to include or omit spaces around them like this:

>> 1-1
=> 0
>> 1 -1 
=> 0
>> 1 - 1
=> 0
>> 1- 1
=> 0

However, in some cases, spaces seem to matter:

>> t = Time.now
=> Tue Apr 13 13:40:24 -0700 2010
>> Time.now -t
NoMethodError: undefined method `-@' for Tue Apr 13 13:40:24 -0700
2010:Time
  from (irb):6
>> Time.now - t
=> 6.895787

Can someone explain what "undefined method `-@'" refers to?

Here's my version of Ruby if it matters:
$ ruby -v
ruby 1.8.7 (2008-08-11 patchlevel 72) [universal-darwin10.0]

Thanks,
Sarah
http://www.ultrasarus.com
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