From: Peter Miller <feurry@...>
Date: 2010-04-09T22:57:30+09:00
Subject: Re: read and write stock prices to file using arrays

> ticker = []
> lines.each do |line|
>   next if line =~ /^#/         # skip comments
>   next if line.chomp.empty?    # skip empty lines
>   ticker << line
> end

>   ticker << line.split(" ")[0]    # or maybe line[/\w+/]

Thank you. The ticker << line is really helpful.

> An idea would be to fill a hash with the data retrieved for each symbol:
> 
> ticker_data = {}
> 
> YahooFinance.get_quotes( quote_type, quote_symbols ) do |qt|
>   puts "QUOTING: #{qt.symbol}"
>   puts "#{qt.name}"
>   puts "#{qt.lastTrade}"
>   ticker_data[qt.symbol] = [qt.name, qt.lastTrade]
> end

I didn't realize a hash could point to more than one object. Awesome.

> and then write to the file the data in ticker_data. I can see
> additional complexity if you want to keep the file exactly as it is
> (with the comments) but inserting the retrieved data in place. The
> easiest would be to just write ticker_data:

this is why i was trying to do $ticker[lines] = line when storing the 
data. I thought I could point the index of the ticker symbol, which 
would tell me what line it was on, to my array $ticker. Then i wanted to 
use that index to write back the ticker data to the same line it came 
from.

i think i need to capture the tickers position in the file at this point
ticker << line
and then somehow use it when writing the file back.

I'm going to work on that, but if there is another approach, or my 
thinking is flawed, a nudge in the right direction would be nice.

The hardest part of learning to code for me is thinking like a computer.

Thanks for the help Jesus.


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