delete_all_subfiles.rb

#!/usr/bin/env ruby

# 批量替换 指定目录及其子目录中所有文件内的字符串

class File
        class << self

        def gsub!(s,t,dir=Dir.pwd)

                Dir.entries(dir).each do |f| 
                        puts f
                        next if(f == "." || f == "..")

                        if(File.file? f) then
                                ct = IO.readlines(f).join
                                if ct.index(s) then
                                        puts "replace file <#{f}>." 
                                        ct.gsub!(s,t)
                                        File.open(f,"w+"){|ff|ff.write ct} 
                                end 
                        elsif(File.directory? f) then
                                self.gsub!(s,t,File.join(dir,f))
                        end 
                end 

        end 

        #end of <<

        end 

end

rm_ext_files.rb

#!/usr/bin/env ruby

# 批量删除指定目录及子目录下含有某个扩展名的文件

class File
	class << self
	
	def grm(path,ext)
	  
  	  Dir.entries(path).each do |f|
  		next if (File.basename(f) == '.' || File.basename(f) == '..')

  		if File.directory?(File.join(path,f))
  			gdel(File.join(path,f),ext)
  		elsif f != File.basename(f).chomp(ext)
  			puts File.join(path,f)
  			FileUtils.rm_f(File.join(path,f))
  		end
  	  end
  	
        end

	#end of <<

	end

end