Archive for the 'Ruby' Category

Delete Leading Whitespace

Delete leading whitespace (spaces/tabs/etc) from beginning of each line


ruby -pe 'gsub(/^\s+/, "")' < file.txt

Double space a file using Ruby

Double space a file with Ruby using the command


ruby -pe 'puts' < file.txt

Installing Rails

You can install Rails in a Fedora system with these commands…


yum -y install ruby ruby-devel ruby-irb ruby-libs ruby-rdoc ruby-ri rubygems
sudo gem update
sudo gem install rails --include-dependencies

Find if a Variable is Defined in Ruby

This will let you find whether a variable is defined in ruby.


if(defined? var_name) then
    print var_name + " is set"
end

Installing a Ruby Gem

Use this command to install a ruby gem in Linux – you must be connected to the net


sudo gem install ruport -y