x.nil? or x.blank?

[Michal Gabrukiewicz]

does someone knows if there is method which checks both? if not then
i'll write my own .. but i am curious if there is one for

return x.nil? or blank?
--
Posted via http://www.ruby-forum.com/.

[Xavier Noria]

On Dec 6, 2007, at 1:03 PM, Michal Gabrukiewicz wrote:

> does someone knows if there is method which checks both? if not then
> i'll write my own .. but i am curious if there is one for
>
> return x.nil? or blank?

(x.nil? or x.blank?) is logically equivalent to x.blank? because nil
is blank:

nil.blank? # -> true

So the answer is yes, you are looking for blank? indeed :-).

-- fxn

[Michal Gabrukiewicz]

oh thanks ... thats good to know ;)
great!

[Robert Walker]

After a quick test it appears that Rails must add the blank? method to
nil. Ruby "out-of-the-box" reports that nil has no blank? method. Just
FYI.

On Dec 6, 7:13 am, Michal Gabrukiewicz <rails-mailing-l...@andreas-

[Ryan Bigg]

According to:

http://noobkit.com/show/ruby/rails/rails-stable/activesupport/object/blank-3f.html

ActiveSupport is what includes the method.

All the code it uses is pretty simple:

def blank?
  if respond_to?
(:empty?) && respond_to?(:strip
)
    empty? or strip.empty?
  elsif 
respond_to?(:empty?)
    empty?
  else
    !
self
  end
end

--
Ryan Bigg
http://www.frozenplague.net

[eggie5]

I want one that checks for empty + empty array....

On Dec 6, 10:34 pm, "Ryan Bigg" <radarliste...@gmail.com> wrote:
> According to:
>
> http://noobkit.com/show/ruby/rails/rails-stable/activesupport/object/...

>
> ActiveSupport is what includes the method.

> I w

> All the code it uses is pretty simple:
>
> def blank?
> if respond_to?(:empty?) && respond_to?(:strip)
> empty? or strip.empty?
> elsif respond_to?(:empty?)
> empty?
> else
> !self
> end
> end
>

[Xavier Noria]

On Dec 7, 2007, at 8:20 AM, eggie5 wrote:

> I want one that checks for empty + empty array....

That's blank? again.

In Rails blank? has an implementation in Object and a few special
cases. For example in Array

class Array #:nodoc:
alias_method :blank?, :empty?
end

In NilClass it returns true directly:

class NilClass #:nodoc:
def blank?
true
end
end

And there are a few more. See activesupport/lib/active_support/
core_ext/blank.rb.

-- fxn

[Karthi kn]

Michal Gabrukiewicz wrote:
> does someone knows if there is method which checks both? if not then
> i'll write my own .. but i am curious if there is one for
>
> return x.nil? or blank?

x.blank? is equivalent to x.nil? or x.empty?

[Michal Gabrukiewicz]

yeah as far as i see our guy is blank? ...

www.webdevbros.net - ruby, rails & co.

[eggie5]

oh duh....