ruby hash from text para

text-to-hash.rb

require "pp"
#
# A utility to get hash out of the text block
#
# Every line is delimited by ls == line separator
# Records in lines are delimited by rs = record separator
#
# The hash is returned where key is the first record and
# value is array of rest of the values
#
# Filter the records that interests you by specifying regular
# expression. By default no filtering will be done.
#
# All white spaces are compressed to no spaces or single spaces
# based on the record separator.
#
def columnize(ls,rs,input,re=nil)
    outhash={}
    wscompressor = (rs == " " ? " " : "")

    lines=input.split(ls)
    lines.each {|line|
        next unless line.match(re) if re
        line.gsub!(/\s+/, wscompressor)
        outhash[line.split(rs)[0]] = line.split(rs)[1..-1]
    }
    outhash
end

inputstring=<<INPUT_STRING
Some text which do not have record separator
Some more text with record separator : that I use in sample
  did                  : 3
    total_size_MB       : 204800.0
    used_size_MB        : 8326.8
INPUT_STRING

puts "=====Input String=========="
puts "#{inputstring}"

puts "=====Extract fields matchin 'total' or 'used' =========="
pp columnize("\n", ":", inputstring, /total|used/i)

puts "=====Extract all fields =========="
pp columnize("\n", ":", inputstring)
puts "==============="