From: Jim Freeze <jim@...>
Date: 2001-04-25T00:31:04+09:00
Subject: [ruby-talk:14154] array#flatten! question

Hello.

Does anyone know why flatten! would complain about recursion and flatten
not. Here is what I tried:
ruby 1.6.3 (2001-03-19) [sparc-solaris2.6]

irb(main):001:0> a = [1,2,3]
[1, 2, 3]
irb(main):002:0> b = [4,5,6]
[4, 5, 6]
irb(main):003:0> c = []
[]
irb(main):004:0> c << a << b
[[1, 2, 3], [4, 5, 6]]
irb(main):005:0> c[0] = b
[4, 5, 6]
irb(main):006:0> c
[[4, 5, 6], [4, 5, 6]]
irb(main):007:0> c.flatten! # => why the complaint here?
ArgumentError: tried to flatten recursive array
(irb):7:in `flatten!'
(irb):7:in `irb_binding'
irb(main):008:0> c.flatten  # => no complaint here
[4, 5, 6, 4, 5, 6]
irb(main):009:0>

Thanks

=========================================================
Jim Freeze
jim@freeze.org
---------------------------------------------------------
No comment at this time.
http://www.freeze.org
=========================================================