my web space
# sort by user id ruby -a -F: -ne 'puts $F.values_at(2, 0).join("\t")' '/etc/passwd' | sort -g # sort by user home directory ruby -a -F: -ne 'puts $F.values_at(5, 0).join("\t")' '/etc/passwd' | sort -g # sort by username ruby -a -F: -ne 'puts $F.values_at(0).join("\t")' '/etc/passwd' | sort -g
AoH = [{"z"=>26}, {"g"=>7}, {"r"=>18}, {"a"=>1}, {"v"=>22}] # sort by key AoH.map{|e| e.to_a.flatten}.sort{|x,y| x[0] < => y[0]} # sort by value AoH.map{|e| e.to_a.flatten}.sort{|x,y| x[1] < => y[1]}
Assume that we have directory, containing files like:
part_1.txt
part_2.txt
part_100.txt
part_200.txt
In case that we are interested in /(\d+)\.\w+$/ as part of the sorting criteria:
Perl
# short but unefficient @a = sort {($a =~ /(\d+)\.\w+$/)[0] < => ($b =~ /(\d+)\.\w+$/)[0]} < *>;
Ruby
regex = Regexp.new(/(\d+)\.\w+$/) # enum.sort {| a, b | block } => array Dir["*"].grep(regex).sort do |a, b| a.match(regex)[0].to_i < => b.match(regex)[0].to_i end # enum.sort_by {| obj | block } => array Dir["*"].grep(regex).sort_by do |name| name.match(regex)[1].to_i end
9th sphere web design