[SOLVED] Parse Text File With Perl

unsymbol · 03-05-2011, 04:55 AM

I'm dumping an HTML document with lynx and wanted to parse some float values from the file but having a hard time figuring out how to do this in a shell script.

Code:

   These weather Pages are provided by the Department of Electronics,
   University of York
   in partnership with our sponsor [1]Vaisala.

Temperature:     6.2 °C        Highest:           33 °C      (Mon 17th Jul 2006)
                               Lowest:            -12.3 °C   (Mon 6th Dec 2010)
Wind Chill:      3.6 °C        Lowest:            -17.8 °C   (Thu 30th Jan 2003)
Pressure:        1028.0 mBars  Highest:           1041 mBars (Sat 17th Feb 2001)
                               Lowest:            949 mBars  (Mon 30th Oct 2000)
Wind Speed:      7.8 mph       Highest:           47.3 mph   (Mon 7th Feb 2011)
Wind Gust:       14.9 mph      Highest:           69.1 mph   (Tue 1st Sep 2009)
Wind Direction:  027 Degrees
Humidity:        85.4 %
Dew Point:       3.9 °C
Total Rainfall:
(Since Midnight) 0.00 mm       Highest:           62.4 mm    (Mon 25th Jun 2007)
                               Highest Intensity: 58.0 mm/h  (Mon 7th Jun 2010)
Total Hail Fall:
(Since Midnight) 0.0 Hits/cm^2

   Fetched at 10:42, Saturday 5th March 2011 (GMT) - (53Â°56'45.74"N,
   1Â°3'13.74"W)
   Maximum and minimum since 21/12/1998

References

   1. http://www.vaisala.com/

I'd like to parse the Temperature: Wind Chill: Pressure: Wind Speed: Wind Gust: Wind Direction: Dew Point: Total Rainfall: Total Hail Fall: values so that I have a text output as follows (maintaining negative values where possible).

Code:

6.2 3.6 1028 7.8 14.9 27 85.4 3.9 0 0

kurumi · 03-05-2011, 05:36 AM

Ruby(1.9+)

Code:

#!/usr/bin/env ruby  -Ku
st=[]
f=File.open("file")
begin
    while (line = f.readline)
        if line[/Temperature|Wind Chill|Pressure|Wind Speed|Wind Gust|Wind Direction|Dew Point/]
            st << line.split(/:\s+/)[1].split(/\s+/)[0]
        elsif line[/Total Rainfall|Total Hail Fall/]
            st << f.readline.split(/\)/)[1].split(/\s+/)[1]
        end
    end
rescue EOFError
    f.close
    puts st.join(" ")
end

Test run:

Code:

# ruby test.rb
6.2 3.6 1028.0 7.8 14.9 027 3.9 0.00 0.0