From: Robert <bob.news@...>
Date: 2002-12-29T04:34:10+09:00
Subject: Re: block from string



"Rudolf Polzer" <AntiATField_adsgohere@durchnull.de> schrieb im Newsbeitrag
news:slrnb0rii4.fmr.AntiATField_adsgohere@katsuragi.durchnull.ath.cx...
> It looks like this can be done using instance_eval. It seems to be
> working:
>
>   #!/usr/bin/ruby
>
>   expr = ARGV.shift()
>
>   ((ARGV.length() == 0) ? Dir["..?* .[^.]* *"] : ARGV).each() do |_|
>     _2 = _.instance_eval(expr)
>     puts "%s => %s" % [_, _2]
>     File.rename(_, _2) unless File.exists?(_2)
>   end
>
> It looks like I don't need the above approach ('|x| 2*x') any more, but
> I'm still interested in it - perhaps it's useful somewhere else.
>
> And - note the ugly glob pattern. Is there something cleaner for "take
> everything from the current directory except . and .."?

how about using "next":

  ( ARGV.empty? ? Dir : ARGV ).each() do |_|
    next if _ == "." || _ == ".."

    _2 = _.instance_eval( expr )
    puts "%s => %s" % [_, _2]
    File.rename(_, _2) unless File.exists?(_2)
  end

regards

    robert