Ruby

I suggest to create a class "FileArray" whose instance behaves just like ARGF do.
And I think ARGF should be an instance of FileArray. Now when I "p ARGF.class", I get "ARGF.class", so ARGF is an instance of ARGF.class, how meaningless it is.

FileArray methods:

# create an instance fa = FileArray.new('a.txt','b.txt','c.txt') # take many methods from IO # most methods from ARGF should be instance methods of ARGF  fa.each {|line| puts line } fa.realines fa.filename # current file # but "argv" not p fa.file_list # in ARGF, its ARGF.argv, but #argv is not a proper name for FileArray # ARGV array can be modified, adding new file into it, all replace to a new file list. # FileArray should add some methods to modify the inner file list. fa.insert(3,"d.txt") fa.delete('a.txt') 

With FileArray, You can create multiple ARGF-like file arrays simultaneously.

For example, I want to mix two groups of files, not two files:

a_files = FileArray.new(*Dir.glob('a*.txt')) b_files = FileArray.new(*Dir.glob('b*.txt')) enum_a = a_files.each enum_b = b_files.each loop do puts enum_a.next puts enum_b.next end