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search, search / replace, search / execute / replace
Strings and Regular Expressions example from a Well House Consultants training course
More on Strings and Regular Expressions [link]
Source code: finder Module: R109
# search, search / replace, search / execute / replace # This example reads a web server log file, extracts all the hits which # are arrivals from Google searches, and tablulates them. It's a demonstration # of regular expressions from our Ruby course, and it also shows a hash of # arrays, sorting, and other features. arrivals = {} for lyne in (File.new "ac_20120221").readlines parts = lyne.split calledfor = parts[6] referer = parts[10] # puts "#{calledfor} - #{referer}" if referer =~ /\.google\..*[?&]q=([^&"]*)/ # puts "#{calledfor} search arrival for #{$1}" query = $1 # Following two lines would be good as a function - URL decoding query.tr! '+', ' ' query = query.gsub(/%(..)/) { "%c" % $1.to_i(16) } # puts "#{calledfor} search arrival for #{query}" # Make me an empty container if this is the first time Google has # sent someone here if arrivals[calledfor] == nil arrivals[calledfor] = [] end # Add in the query that was used into that empty container if query == "" # print "#{$.} lyne" # To add - act on empty queries (what are they?) else arrivals[calledfor].push query end end end # List out all the pages that were arrived at, and a count of arrival numbers for landingplace in arrivals.keys numberofarrivals = arrivals[landingplace].length puts "#{numberofarrivals} to #{landingplace}" end # What were all the requests for popular pages? for landingplace in arrivals.keys numberofarrivals = arrivals[landingplace].length if numberofarrivals > 30 arrivals[landingplace].sort! puts "Arrived at #{landingplace} from" for arr_string in arrivals[landingplace] puts " .......... #{arr_string}" end end end puts "Analysis was of #{$.} lines" Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Ruby * Ruby Programming Also available on on site courses for larger groups Books covering this topic
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This example comes from our "Strings and Regular Expressions" training module. You'll find a description of the topic and some
other closely related examples on the "Strings and Regular Expressions" module index page.
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