From: "Simon Kröger" <SimonKroeger@...>
Date: 2006-08-12T16:32:33+09:00
Subject: Re: Regexp Parsing -- What's the right way?

skelastic@gmail.com wrote:
> Greetings,
> 
> I'm trying to parse the following line:
> 
> "00608 P 135 001 LEC Tu 2-5P 210 WHEELER Information Tech and Soceity 3
> LAGUERRE"
> 
> i've constructed the following regexp:
> /(\d{5}).(\D\s\w{2,4}).(\d{1,4}\s\D{3}).(\D{1,4}\s\d+).*(\d{1,4}\s\D{1,9}).(\w+).*(\d?).*(\w{1,14}).*/
> 
> with a input file i've successfully produced the following output:
> control# 00608                     ---- correct
> course#: P 135                     ---- correct
> section#: 001 LEC                     ---- correct
> day-hour#: Tu 2                     ---- missing '-5P
> room#: 3 LAGUERRE,           ---- should be 210 WHEELER
> course-name#: M                  --- IT and Soceity
> credits#:                               --- should be 3
> prof#: 5                                 --- should be LAGUERRE
> 
> i'm a novice to ruby and regexp. i would like to know if i'm taking the
> right approach.
> i'll eventually nail it but any hints or suggestions would be useful.
> 
> appreciate the help.

I would go with split in this case:

t = "00608 P 135 001 LEC Tu 2-5P 210 WHEELER Information Tech and Soceity 3
LAGUERRE"
a = t.split
#strip from the beginning
control = a.shift
course = a.shift + ' ' + a.shift
section = a.shift + ' ' + a.shift
hour = a.shift + ' ' + a.shift
room = a.shift + ' ' + a.shift
#strip from behind
prof = a.pop
credits = a.pop
#the rest is the name
coursen = a.join(' ')

puts "control: #{control}"
puts "course: #{course}"
puts "section: #{section}"
puts "hour: #{hour}"
puts "room: #{room}"
puts "coursen: #{coursen}"
puts "credits: #{credits}"
puts "prof: #{prof}"

cheers

Simon