ruby-core

So, is it correct to assume that for language constructs that create built-in types like Range, Array, Hash etc that user-defined initialize methods are never called?

[#11549] Re: Proc initialize method not called under certain circumstances — "Berger, Daniel" <Daniel.Berger@...> 2007/06/28

> -----Original Message-----

[#11550] Re: Proc initialize method not called under certain circumstances — MenTaLguY <mental@...> 2007/06/28

On Fri, 29 Jun 2007 06:24:48 +0900, "John Lam (CLR)" <jflam@microsoft.com> wrote:

[#11553] Re: Proc initialize method not called under certain circumstances — "Marcel Molina Jr." <marcel@...> 2007/06/28

On Fri, Jun 29, 2007 at 06:54:49AM +0900, MenTaLguY wrote:

[#11554] Re: Proc initialize method not called under certain circumstances — murphy <murphy@...> 2007/06/28

> ... for language constructs that create

[#11560] Re: Proc initialize method not called under certain circumstances — Yukihiro Matsumoto <matz@...> 2007/06/29

Hi,

[#11548] NilClass, TrueClass, FalseClass special cased for singleton classes? — "John Lam (CLR)" <jflam@...>

If you do:

3 messages 2007/06/28

[#11557] Re: NilClass, TrueClass, FalseClass special cased for singleton classes? — Nobuyoshi Nakada <nobu@...> 2007/06/29

Hi,

[#11559] Re: NilClass, TrueClass, FalseClass special cased for singleton classes? — Joel VanderWerf <vjoel@...> 2007/06/29

John Lam (CLR) wrote:

[#11555] Name of Classes — =?ISO-8859-15?Q?Wolfgang_N=E1dasi-Donner?= <wonado@...>

Moin, moin!

2 messages 2007/06/28

[#11558] Re: Name of Classes — Nobuyoshi Nakada <nobu@...> 2007/06/29

Moin,

[#11556] delete_if with destructive methods in block — Florian Gross <florgro@...>

Hi,

3 messages 2007/06/29

[#11561] Re: [BUG] delete_if with destructive methods in block — Nobuyoshi Nakada <nobu@...> 2007/06/29

Hi,

[#11567] Re: delete_if with destructive methods in block — Florian Gross <florgro@...> 2007/06/30

That fixes it for me. I got no regressions from Rubinius' hash spec

[#11562] Can clear frozen array using initialize() — Florian Gross <florgro@...>

Hi,

2 messages 2007/06/29

[#11563] Re: [BUG] Can clear frozen array using initialize() — Yukihiro Matsumoto <matz@...> 2007/06/30

Hi,

Array#slice!() expands array inconsistently

From: Florian Gross <florgro@...>

Date: 2007-06-15 14:02:30 UTC

List: ruby-core #11469

Hi,

I just stumbled upon this behaviour while specifying Array methods for
Rubinius:

irb(main):001:0> ary = [1, 2]
=> [1, 2]
irb(main):002:0> ary.slice!(100)
=> nil
irb(main):003:0> ary
=> [1, 2]
irb(main):004:0> ary.slice!(100, 0)
=> nil
irb(main):005:0> ary
=> [1, 2, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil]

Is this intended behaviour? I'd expect .slice!() with an index and an
index and a length to behave consistently. (I'd also expect
Array#slice!() not to increase the size of the Array.)

It also happens with a range, btw:

irb(main):001:0> ary = [1, 2]
=> [1, 2]
irb(main):002:0> ary.slice!(100...100)
=> nil
irb(main):003:0> ary
=> [1, 2, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil,
nil, nil]

I'm seeing this in ruby 1.8.4 (2005-12-24) and ruby 1.9.0 (2007-04-02
patchlevel 0).

The documentation says that is equivalent to this Ruby code:

        def slice!(*args)
          result = self[*args]
          self[*args] = nil
          result
        end

If that were the case slice!(100) would also expand the Array.

Kind regards,
Florian Gross

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