remove rows in file - Ruby

Question

What is a clever way to remove rows from a CSV file in ruby where a particular value exists in a particular row?

Here\'s an example of a file:

350 lbs.,          


        

Answer 1

You can also create a Hash which would NOT allow duplicate records as its entries . For example, the following code should help:

require 'optparse'
require 'csv'
require 'pp'

options = Hash.new

OptionParser.new do |opts|
    opts.banner = "Usage: remove_extras.rb [options] file1 ..."

    options[:input_file] = ''
    opts.on('-i', '--input_file FILENAME', 'File to have extra rows removed') do |file|
        options[:input_file] = file
    end

end.parse!
if File.exists?(options[:input_file])
    p "Parsing: #{options[:input_file]}"
        UniqFile=Hash.new    
        File.open(options[:input_file]).each do |row|
        UniqFile.store(row,row.hash)                
end
puts "please enter the output filename: \n"
aFile=File.open(gets.chomp, "a+")
UniqFile.each do|key,value| 
aFile.syswrite("#{key}")
end  

end