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Ruby Custom Sort
<pre class='prettyprint' language='ruby'>require 'csv' def sort_csv(filename, fields = ["ID"], reverse = false) csv_data = load_csv_data(filename) sort_fields = get_sort_indexes(fields, csv_data['headers']) sorted = custom_sort(csv_data['headers'], csv_data['rows'], sort_fields) sorted.reverse! if reverse write_csv_file(filename, sorted, csv_data['headers']) end def custom_sort(csv_headers, csv_data, sort_indexes) eyecolor_sort = ["Red","Blue","Turquoise","Brown","Green"] hair_colors = csv_data.map {|c| c[csv_headers.index("HAIRCOLOR")]}.sort.uniq if hair_colors.include?('Brown') and hair_colors.include?('Black') brown = hair_colors.delete('Brown') hair_colors.insert(hair_colors.index("Black") + 1, brown) end sorted = csv_data.sort do |a,b| indexes = sort_indexes.dup until indexes.empty? do idx = indexes.shift if (a[idx] != b[idx]) or indexes.empty? if csv_headers[idx] == "EYECOLOR" # do eyecolor sort comparison = "eyecolor_sort.index(a[idx]) <=> eyecolor_sort.index(b[idx])" elsif csv_headers[idx] == "HAIRCOLOR" # do hair sort comparison = "hair_colors.index(a[idx]) <=> hair_colors.index(b[idx])" else # do alpha sort comparison = "a[idx] <=> b[idx]" end end break if comparison end eval(comparison) end sorted end def load_csv_data(file) data = {} csv = CSV.open(file, 'r') data['headers'] = csv.shift data['rows'] = [] csv.each do |row| data['rows'] << row end csv.close data end def write_csv_file(file, data, headers) output = File.open("#{file}.sorted", 'wb') CSV::Writer.generate(output) do |csv| csv << headers data.each do |d| csv << d end end output.close end def get_sort_indexes(fields, data) idx = [] fields.each do |f| idx << data.index(f) end idx end</pre> <a href="http://www.refactormycode.com/codes/418-ruby-custom-search" style="color:#fff" title="As seen on RefactorMyCode.com"><img alt="Small_logo" src="http://www.refactormycode.com/images/small_logo.gif" style="border:0" /></a>