Re: [Wtr-general] Method Names as variables?

Keith Lancaster Wed, 19 Apr 2006 08:28:10 -0700

Glad to help. Have fun with Ruby - its a great language and a good one for learning object-oriented programming.
Keith

On 4/19/06, Rodrigo Julian Martin <[EMAIL PROTECTED]> wrote:

Hello Keith!

The sample code you wrote works just fine!

I hadn't understand the .send until I saw it on your example..

And the tips for the Array creation and the iteration of all objects with .each |do| really like me..

As you can see from my code I'm more of structured programming, but I hope to develop a more Ruby style in my code… and definitively you and many more people in this list are helping!

Sorry for my bad english, and thanks again!

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Keith Lancaster
Sent: Martes, 18 de Abril de 2006 09:04 p.m.

To: wtr-general@rubyforge.org
Subject: Re: [Wtr-general] Method Names as variables?

It might be helpful if you described what it is you are trying to accomplish. I have a feeling that there are much easier ways to get what you are looking for than the approach you are taking.

Then method I mentioned previously will in fact work for your line. It would look like this:

if (todosdocs[i.to_s].send(propertie) == value

That said, a couple of quick notes on the code example:

Other than the browser object, it does not appear from the code sample that there is a need to make other variables global (starting with $).

You can create the array vector_fobjects simply by saying

      vector_fobjects = []
    You can certainly do Array.new instead, but there is no need to create the object first and set it to nil. The same goes for the vector_search variable.
3. As someone else noted, you have not initialized todosdocs anywhere

Again without knowing exactly what you are trying for, you might try this:

# assume you have $browser some defined and initialized someplace
def ENRA_FindObjects(propertie, value)
    return_vector = []
    all_objects = $browser.document.body.all
    all_objects.each do |obj|
        return_vector << obj if obj.send(propertie) == value
   end
   return_vector
end

HTH,
Keith

(You will of course need to test this – I tried something similar in irb and it looked like it would work)

On 4/18/06 3:27 PM, "Rodrigo Julian Martin" <[EMAIL PROTECTED]> wrote:

Hello Keith!
Thanks for the quick answer, but I'm afraid that this is not what I'm looking for…
I have written a function which search objects from a page, passing a propertie and a value as parameters…

This is the function:

def ENRA_FindObjects(propertie, value)
   $vector_fobjects=nil
   $vector_fobjects=Array.new
   j=0
   alldocs=nil
  alldocs=$browser.document.body.all
  count=$browser.document.body.all.length
   $vector_search=nil
   $vector_search=Array.new
   for i in 0..count-1 do
      if (todosdocs[i.to_s]."#{propertie}=="#{value}")
           $vector_search[j]=todosdocs[i.to_s]
           j+=1
       end
   end
   return($vector_search)
end

So, I load a page with a browser, and execute this function with, let's say:

array_objects=ENRA_FindObjects("className","button")

I hope the question is more clear now…

How can I write this properly? à todosdocs[i.to_s]."#{propertie}=="#{value}" ,
In order that the propertie could be defined by a parameter?

Thank you so much for your time…
Cheers

Rodrigo Julian Martin

From: Keith Lancaster [ mailto:[EMAIL PROTECTED]
Sent: Martes, 18 de Abril de 2006 05:17 p.m.
To: wtr-general@rubyforge.org; Rodrigo Julian Martin
Subject: Re: [Wtr-general] Method Names as variables?

I am assuming Item(80) in your example is an object.

In Ruby, you can use the "send" method to call a function.

Example:

class MyClass
    def my_function
        puts "in my function"
    end
end

c = MyClass.new
function_name = "my_function"
c.send(function_name)

HTH,
Keith

On 4/18/06 3:00 PM, "Rodrigo Julian Martin" <[EMAIL PROTECTED]> wrote:
Hello!

I have another code question…

Can I call an object method by using a variable?

I've tried something like this:

propertie="className"
a = Item(80).'#{propertie}'

And obviously doesn't work…

I've also tried:

a = Item(80).{propertie}

but this is a call to a hash…

Any help would be really appreciated…
Thanks in Advance!

Rodrigo Julian Martin

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Re: [Wtr-general] Method Names as variables?

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