From: katz bo <redmine@...>
Date: 2009-12-21T01:50:10+09:00
Subject: [ruby-core:27250] [Bug #2422] splat operator fails on array of 1 element

Issue #2422 has been updated by katz bo.


I personally think *[1, 2, 3] should be always unpacked first.

a = *[1, 2, 3] #(unpack Array due to *) should be equal to:
a = 1, 2, 3    #(as Ruby is very smart) is equal to: (this is really the tricky part)
*a = 1, 2, 3   #which packs 1, 2, 3 into Array a. Hence is equal to
a = [1, 2, 3]

a = *[1] #(unpack Array due to *) should be equal to:
a = 1    #(again, Ruby is smart it won't read this as *a = 1)

a, b = *[1, 2] #the Array gets unpacked first, so we get:
a, b = 1, 2    #this behaves identical to the next line:
a, b = [1, 2]  #Hence a = 1; b = 2

If my understanding is correct, then the 1.9 behavior is a bug(TM).

I'm a noob so don't expect me to know what I'm talking about :D.
----------------------------------------
http://redmine.ruby-lang.org/issues/show/2422

----------------------------------------
http://redmine.ruby-lang.org