From: Rob Biedenharn <Rob@...>
Date: 2010-03-24T22:50:56+09:00
Subject: Re: Manipulating an Array Element

On Mar 24, 2010, at 9:28 AM, Saeed Bhuta wrote:

> Gavin Kistner wrote:
>> On Mar 24, 4:07�am, Saeed Bhuta <saeed.bh...@placr.co.uk> wrote:
>>> I have saved the html code into an Array but having difficulty
>>> manipulating the elements to extract the exact value that I  
>>> require from
>>> the html code.
>>
>> What difficulty?
>>
>>> � � � � � � � � #in this part, I have tried various  
>>> string manipulation
>>> methods to extract the values that i need, but doesn't seem to  
>>> work, it
>>> either returns nil for each element or throws an error
>>
>> What do you want to do? What have you tried? What happened? Why  
>> wasn't
>> it what you wanted?
>>
>>> Any help is greatly appreciated.
>>
>> Provide more details, get more help :)
>
> require 'rubygems'
> require 'hpricot'
> require 'open-uri'
>                #open the web page
>    @doc= Hpricot(open("http://www.website.com"))
>
>    #searches for images in the page and stores them in an array
>    images = (@doc/'img[@width^="54"]')
>
>
>    #puts images
>
>    #go through images names to get platform number
>    images.each { |img|
>    img.to_s
>    #extract characters one to four from image name
>                img[0,4]

Assuming your problem is here^

img.to_s does not convert the image to a string (img is a dom element,  
right?)

Try something like img.to_s[0,4] or img['src'][0,4] (but please look  
in the documentation for Hpricot to see how to get the part you want  
as a string).

-Rob

>                puts img
>    }
>
> However this returns the error 'wrong number of arguments (2 for 1)
> (ArgumentError)'
>
> Hope this make sense...
>
> Saeed
> -- 
> Posted via http://www.ruby-forum.com/.
>

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com