key/value store for CodeBrawl

README.md

#Sloth

Sloth is a very lazy, slow key value store. It was created for Code Brawl. Its extremely simple and essentially uses files for storage.

You can do get, set and delete and also retreive a list of keys.

require 'sloth' db = Sloth.new('db_name')

##set db.set('foo',"honkey") db.set('bar','tonk')

##get puts db.get('foo') => 'honkey'

##delete db.delete('foo')

##list keys puts db.keys => ['bar']

min.rb

class Sloth;attr_accessor :d;def initialize(d);@d=d;Dir.mkdir(d) unless File.directory?(d);end;def set(k,v);l=f(k,"w");l.puts v;end;def get(k);return unless exists?(k);l=f(k,"rb");l.read;end;def delete(k);return unless exists?(k);File.delete("#{@d}/#{k}.slo");end;def keys;Dir.entries(@d).map{|x|x[0..-5]};end;def exists?(k);File.exists? "#{@d}/#{k}.slo";end;def f(k,m);File.open("#{@d}/#{k}.slo",m);end;end

sloth.rb

 class Sloth

    attr_accessor :db

    def initialize(db)
      @db = db
      Dir.mkdir(db)  unless File.directory?(db)
    end

    def set(key, value)
      file = f(key, "w")
      file.puts value
      file.close
    end

    def get(key)
      return unless exists?(key)
      file = f(key, "rb")
      return file.read
    end

    def delete(key)
      return unless exists?(key)
      File.delete("#{@db}/#{key}.slo")
    end

    def keys
       Dir.entries(@db).map {|x| x[0..-5]}
    end

    private

      def exists?(key)
        File.exists? "#{@db}/#{key}.slo"
      end

      def f(key, mode)
        File.open("#{@db}/#{key}.slo", mode)
      end


  end