From: Junhui Liao <junhui.liao@...>
Date: 2010-08-06T07:05:02+09:00
Subject: Re: my script just read one line?


> This is how I'd do it (untested, just an idea):
> 
> File.open("../data/test_2lines.tsv") do |file|
>   total_data = Array.new(4096) {[]} # Array containing an array for
> each file we will generate
>   first_line = file.readline.chomp.split("\t")
>   first_line_times = first_line.each_slice(2).map{|time,signal| time}
>   file.each_line do |record|
>     record.chomp.split("\t").each_slice(2).with_index do |(time,signal), 
> index|
>     total_data[index] << "#{time.to_f -
> first_line_times[index].to_f}\t#{signal}\n"
>   end
> end
> 
> total_data.each_with_index do |lines, index|
>   File.open("header_split_#{index}"+".tsv" , "w") do |f|
>   � f.puts total_data[index]
>   end
> end
> 
> Hope this helps,
> 
> Jesus.



Dear Jesus,

I modified little, then the code worked.
This new script just took 3 (THREE) minutes, it's incredible !!!
Millions of thanks to you!

My main reference book is <<Programing ruby_the progmatic programmers>>,
I don't know why in this book, I could not find these information, like 
each_with_index,
and like the example of two items between two bars "||", 
map{|time,signal| time} ?
Where I can find these information ?

Thanks a lot in advance!
Cheers,
Junhui
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