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Trying to parse an array of rss feeds without success

Louis-pierre Lp.dahito

1/14/2009 7:03:00 AM

hey folks,

I'm trying to make a basic feeds parser... It works fine when I have one
feed only but as soon as I try to parse an array of feeds, it's gonna
parse it correctly but I won't be able to fetch any data out of it...
Here is my code...

class Site
attr_accessor :domain, :name

def initialize
@domain = domain
@name = name
end
end


a = Site.new
a.domain = "http://www.mininova.org/rss...
a.name = "mininova"

b = Site.new
b.domain = "http://static.demonoid.com/rss/0...
b.name = "demonoid"

c = Site.new
c.domain = "http://rss.thepiratebay.o...
c.name = "thepiratebay"

allfeeds = [ a, b, c ]

require 'rss/1.0'
require 'rss/2.0'
require 'open-uri'

def parse_torrents(source)
# source = self.domain # url or local file
content = "" # raw content of rss feed will be loaded here
open(source) do |s| content = s.read end
RSS::Parser.parse(content, false)
end

torrents = allfeeds.each { |feed| parse_torrents(feed.domain) }

torrents.each { |t| puts t.channel.title }

The error message I get is only on the last line of code... removing the
last line doesn't show any error message.

Here is the message i get from RubyMate:

NoMethodError: undefined method â??channelâ?? for #<Site:0x8a520>

at top level in global.rb at line 38
method each in global.rb at line 38
at top level in global.rb at line 38
Program exited.

I need help even though it's a pretty basic question...

Thank you guys...
--
Posted via http://www.ruby-....
2 Answers

Jan-Erik R.

1/14/2009 1:37:00 PM

0

Louis-pierre Lp.dahito schrieb:
> hey folks,
>
> I'm trying to make a basic feeds parser... It works fine when I have one
> feed only but as soon as I try to parse an array of feeds, it's gonna
> parse it correctly but I won't be able to fetch any data out of it...
> Here is my code...
>
> class Site
> attr_accessor :domain, :name
>
> def initialize
> @domain = domain
> @name = name
> end
> end
>
>
> a = Site.new
> a.domain = "http://www.mininova.org/rss...
> a.name = "mininova"
>
> b = Site.new
> b.domain = "http://static.demonoid.com/rss/0...
> b.name = "demonoid"
>
> c = Site.new
> c.domain = "http://rss.thepiratebay.o...
> c.name = "thepiratebay"
>
> allfeeds = [ a, b, c ]
>
> require 'rss/1.0'
> require 'rss/2.0'
> require 'open-uri'
>
> def parse_torrents(source)
> # source = self.domain # url or local file
> content = "" # raw content of rss feed will be loaded here
> open(source) do |s| content = s.read end
> RSS::Parser.parse(content, false)
> end
>
> torrents = allfeeds.each { |feed| parse_torrents(feed.domain) }
>
> torrents.each { |t| puts t.channel.title }
>
> The error message I get is only on the last line of code... removing the
> last line doesn't show any error message.
>
> Here is the message i get from RubyMate:
>
> NoMethodError: undefined method â??channelâ?? for #<Site:0x8a520>
>
> at top level in global.rb at line 38
> method each in global.rb at line 38
> at top level in global.rb at line 38
> Program exited.
>
> I need help even though it's a pretty basic question...
>
> Thank you guys...
the error message has all you need to get rid of this mistake.
"...for #<Site...>"

Now start irb and type something like:
irb> myarray = [1,2,3]
irb> newarray = myarray.each { |i| i * 10 }
irb> p newarray
do you see it?
now try Array#map:
irb> myarray = [1,2,3]
irb> newarray = myarray.map { |i| i * 10 }
irb> p newarray

see the difference?

Louis-pierre Lp.dahito

1/14/2009 2:06:00 PM

0

badboy wrote:
> Louis-pierre Lp.dahito schrieb:
>> def initialize
>> b = Site.new
>> require 'rss/2.0'
>>
>> method each in global.rb at line 38
>> at top level in global.rb at line 38
>> Program exited.
>>
>> I need help even though it's a pretty basic question...
>>
>> Thank you guys...
> the error message has all you need to get rid of this mistake.
> "...for #<Site...>"
>
> Now start irb and type something like:
> irb> myarray = [1,2,3]
> irb> newarray = myarray.each { |i| i * 10 }
> irb> p newarray
> do you see it?
> now try Array#map:
> irb> myarray = [1,2,3]
> irb> newarray = myarray.map { |i| i * 10 }
> irb> p newarray
>
> see the difference?

I do see the difference... Thank a lot you fixed my problem... I thought
that the each iterator would do the exact same thing the map method
did...
Anyway thank you very much for your time :)

--
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