From: "Aurélien AMILIN" <aurelien.amilin@...>
Date: 2010-04-11T20:29:35+09:00
Subject: Re: how to analyse web with nokogiri?

--00032555b3e6994fb00483f457e6
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

1\
css("table tr td") will create an array of all td elements of the <table>
I've passed to Nokogiri::HTML() method, that's why I can call the each meth=
o
on the result

2\
You'v got a table with 3 columns (1 for title, and 2 for values) so i use
the modulo (%, it's a math function : 0%3=3D0; 1%3=3D1; 2%3=3D2; 3%3=3D0; 4=
%3=3D1 ..)
function to place all the data at the right index
result[i%3] ||=3D "" means if result[i%3] is nil then put an empty string i=
nto
it
#{} helps to include a string into another, here i use #{} to add a ; at th=
e
end of the string

2010/4/11 Pen Ttt <myocean135@yahoo.cn>

> think AMILIN Aur=E9lien ,i get it
> i am a beginner,there are  some problems :
> 1\
> what is the meaning of  css("table tr td")?
>
> 2\
> what is the meaning of
>  result[i%3] ||=3D ""   #let nil be result array??
>  what is i%3 and || ?
>  result[i%3] << "#{td.content};"   #td.content is the td value,i know
>  what is     #{   }  ?
>
>
>
>
>
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

--00032555b3e6994fb00483f457e6--