From: Son SonOfLilit <sonoflilit@...>
Date: 2006-06-03T22:20:13+09:00
Subject: Re: []= and two dimensional arrays

------=_Part_16229_27096680.1149340809855
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

Oh, solved. Solution:
a = Array.new.fill(Array.new.fill("x", 0, 4).dup, 0, 4)

I was storing references to the same array.

Is there a better idiom for bulding 2d arrays and initializing them to a
constant value?

On 6/3/06, Son SonOfLilit <sonoflilit@gmail.com> wrote:
>
> Oi, got that all wrong. Correct version:
>
>
> I expect:
> > irb(main):002:0> a = Array.new.fill(Array.new.fill("x", 0, 4), 0, 4)
> > => [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"],
> > ["x", "x", "x", "x"]]
> > irb(main):003:0> p a
> > [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x",
> > "x", "x", "x"]]
> > => nil
> > irb(main):004:0> a[2][3] = "a"
> > => "a"
> > irb(main):005:0> p a
> > [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x",
> > "x", "x", "a"]]
> > => nil
> > irb(main):006:0>
> >
> > ========================
> >
> > I get:
> > irb(main):002:0> a = Array.new.fill(Array.new.fill("x", 0, 4), 0, 4)
> > => [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"],
> > ["x", "x",
> >  "x", "x"]]
> > irb(main):003:0> p a
> > [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x",
> > "x", "x
> > ", "x"]]
> > => nil
> > irb(main):004:0> a[2][3] = "a"
> > => "a"
> > irb(main):005:0> p a
> > [["x", "x", "x", "a"], ["x", "x", "x", "a"], ["x", "x", "x", "a"], ["x",
> > "x", "x
> > ", "a"]]
> > => nil
> >
> > =========================
> >
> > I spend hours debugging and when I find it out, I have no clue how to
> > solve it.
> >
> > Could somebody clue me as to a solution?
> >
> > Thanks,
> >
> > SonOfLilit
> >
>
>
> On 6/3/06, Son SonOfLilit <sonoflilit@gmail.com> wrote:
> >
> > I expect:
> > irb(main):002:0> a = Array.new.fill(Array.new.fill("x", 0, 4), 0, 4)
> > => [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"],
> > ["x", "x", "x", "x"]]
> > irb(main):003:0> p a
> > [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x",
> > "x", "x", "x"]]
> > => nil
> > irb(main):004:0> a[2][3] = "a"
> > => "a"
> > irb(main):005:0> p a
> > [["x", "x", "x", "a"], ["x", "x", "x", "a"], ["x", "x", "x", "a"], ["x",
> > "x", "x", "a"]]
> > => nil
> > irb(main):006:0>
> >
> > ========================
> >
> > I get:
> > irb(main):002:0> a = Array.new.fill(Array.new.fill("x", 0, 4), 0, 4)
> > => [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"],
> > ["x", "x",
> >  "x", "x"]]
> > irb(main):003:0> p a
> > [["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x", "x", "x", "x"], ["x",
> > "x", "x
> > ", "x"]]
> > => nil
> > irb(main):004:0> a[2][3] = "a"
> > => "a"
> > irb(main):005:0> p a
> > [["x", "x", "x", "a"], ["x", "x", "x", "a"], ["x", "x", "x", "a"], ["x",
> > "x", "x
> > ", "a"]]
> > => nil
> >
> > =========================
> >
> > I spend hours debugging and when I find it out, I have no clue how to
> > solve it.
> >
> > Could somebody clue me as to a solution?
> >
> > Thanks,
> >
> > SonOfLilit
> >
>
>

------=_Part_16229_27096680.1149340809855--