From: jason joo <jasonjoo.god@...>
Date: 2010-08-12T13:41:07+09:00
Subject: Re: Multithreading problem

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u forgot to add it to ur thread list array "threads[]" after u created a
thread.
so the array "threads[]" left empty and u joined nothing in the end
then these threads were terminated because the main thread was terminated
and u got nothing in that file

2010/8/12 Pen Ttt <myocean135@yahoo.cn>

> probem1:
> the following program can only run  in irb console,it can't run with
> command :
> ruby /home/test.rb,why?
> require 'rubygems'
> require 'net/http'
> threads = []
> open("/home/pt/test/data","a+") do |wfile|
> str=%w(http://table.finance.yahoo.com/table.csv?s=IBM
> http://table.finance.yahoo.com/table.csv?s=YHOO
> http://table.finance.yahoo.com/table.csv?s=AACC)
> for page_to_fetch in str
>   Thread.new(page_to_fetch) do |url|
>    info = Net::HTTP.get_response(URI.parse(url)).body
>    puts info
>   end
>  end
> threads.each {|thr| thr.join}
> end
> problem2:
> i want to write output into my file,just change "puts info"  into
> "wfile.puts info",it can not run.
> require 'rubygems'
> require 'net/http'
> threads = []
> open("/home/pt/test/data","a+") do |wfile|
> str=%w(http://table.finance.yahoo.com/table.csv?s=IBM
> http://table.finance.yahoo.com/table.csv?s=YHOO
> http://table.finance.yahoo.com/table.csv?s=AACC)
> for page_to_fetch in str
>   Thread.new(page_to_fetch) do |url|
>    info = Net::HTTP.get_response(URI.parse(url)).body
>    wfile.puts info
>   end
>  end
> threads.each {|thr| thr.join}
> end
>  --
> Posted via http://www.ruby-forum.com/.
>
>

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