Help me about nil check of veriable( question of a niw bie)

ruby-talk
1

Hi guys,
        I have a string variable named as 'last_name'. how can i check
NULL(nil) of this veriable?

as exapmle
if ( empty(last_name) ) #*
    # code
else
#code
end

How can I write the syntax in the if statement(*)?
Please help me.

Sasaki

···

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Posted via http://www.ruby-forum.com/.

2

Hi,

I think the .nil? method is the one you're looking for:

irb(main):001:0> some_nil = nil
=> nil
irb(main):002:0> some_nil.nil?
=> true

Hope that helps,
-Harold

···

On 3/27/07, Sasaki <amin@e-sao.co.jp> wrote:

Hi guys,
        I have a string variable named as 'last_name'. how can i check
NULL(nil) of this veriable?

as exapmle
if ( empty(last_name) ) #*
    # code
else
#code
end

3

Note that an empty string is not nil.
So if you need to check for nil or empty try:

if last_name.nil? || last_name.empty? #...

Cheers
Chris

···

On Mar 27, 4:30 am, Sasaki <a...@e-sao.co.jp> wrote:

Hi guys,
        I have a string variable named as 'last_name'. how can i check
NULL(nil) of this veriable?

as exapmle
if ( empty(last_name) ) #*
    # code
else
#code
end

How can I write the syntax in the if statement(*)?
Please help me.

Sasaki

--
Posted viahttp://www.ruby-forum.com/.