From: Adrian Roskrow <adrian@...10systems.co.uk>
Date: 2007-01-18T20:33:08+09:00
Subject: Re: Reading from $stdin

Well I have written a small script to read from stdin and guess what, it 
just sits and does nothing!! I guess I must of got it wrong! Here is 
small snip-it
   @number = $stdin.each_with_index do |line, index|
        printf "%4d %s", index, line
        end

which is just the same as roberts code. I have a question, the bar code 
reader is connected to a usb port, do I still use stdin (or is this just 
for the keyboard?)

how do I redirect the input to my code?

I'm sorry to be asking basic questions but I am new to ruby.

Adrian

Robert Klemme wrote:
> On 17.01.2007 20:53, Adrian Roskrow wrote:
>> In answer to your question, no I don't redirect stdin, should I?
> 
> Well, if you don't the script will sit there and wait for you to enter
> something via keyboard.  And you won't see any output from your version
> of the script until you press Ctrl-Z or whatever is the stream
> termination sequence on your operating system because the #read call
> reads all the way to the end of the stream.  So, as Ara said, as long as
> there is no end #read cannot return and you don't see any output.  The
> story is different with a line based implementation like mine.
> 
>> I like your code snippets and will try them out post hast.
> 
> Have fun!
> 
>   robert

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