Remove additional newlines from file output

I have a script that dumps data from a serial port to both a terminal and the harddrive. The output to the terminal looks fine, however the file write an ^M after each resulting in an extra newline for every other line.

The offending code:

# run and dump to file.
loop {
    # output data to log file.
    data = sp.read
    data.delete!("\C-M")   # Removes escape character.
    if( data != "" ) 
        puts data
        File.open($log_开发者_运维技巧file, 'a') { |f| f.write( data ) }
    end
}

Example output: On the terminal:

1
2
3

In the file

1

2

3

Edit: The solution is to run data.delete!("\C-M") after the read.

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Try opening the data written to the file in ruby with read. I suspect the problem you have is with the carriage return characters that sometimes cause problems when transferring a file from windows to linux or when downloading files via some mail clients.

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I don't know how your serial data looks like, but you can always do a chomp on data variable before writing. Try it and see how it goes.

Edit: If you want to remove the ^M, maybe you can try sp.read.tr("\r","")