From: Josh Cheek <josh.cheek@...>
Date: 2010-11-12T21:54:03+09:00
Subject: Re: Ruby vs PHP for the web

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2010/11/12 Jes=FAs Gabriel y Gal=E1n <jgabrielygalan@gmail.com>

> On Thu, Nov 11, 2010 at 11:50 PM, Mike Stephens <rubfor@recitel.net>
> wrote:
> > Charles Calvert wrote in post #960599:
> >>  Ruby uses
> >> strong, though dynamic, typing.
> >
> > Can you explain what you mean? That seems a contradiction in terms.
>
> http://en.wikipedia.org/wiki/Strong_typing
>
> It means that the language imposes restrictions about how different
> types are mixed, and avoids implicit conversions of types, among other
> things. Compare:
>
> Javascript (weak typing):
>
> 2 + '2' =3D> '22'
>
> Ruby (strong typing):
>
> 2 + '2' =3D> TypeError: String can't be coerced into Fixnum
>


Is Ruby strongly typed?

2 + 2.0 # =3D> 4.0

Here it has implicitly converted the integer 2 to a float, in order to be
able to add them. You can even make your specific example pass, exactly as
written, by defining String#coerce:

class String
  def coerce(num)
    return num.to_s , self
  end
end

2 + '2' # =3D> "22"

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