From: Bill Kelly <billk@...>
Date: 2001-12-29T09:44:49+09:00
Subject: [ruby-talk:29609] Re: Stripping substrings from strings


From: "Paul Vallance" <paulvallance@wanadoo.nl>

> I would like to put the string returned via the TCP Server to my
> rubyscript into a variable (@readdata)  and strip the words "TCP/XT
> OK" from the end of it and update the variable, then use the contents
> of this variable in a following send... something like below... . I
> thought str.gsub would do it, ie replace the substring "TCP/XT OK"
> with an empty string (though I'm sure "" is not right syntax for an
> empty string).

"" is indeed an empty string in Ruby, as is '' or %q{} etc.

> 
> #!/usr/bin/env ruby
> 
> require 'socket'
> t = TCPSocket.new("192.168.0.178",13)
> 
> t.send("/firstbox\n",0)
> @readdata = t.recv(30)
> puts @readdata // which is "123456789 TCP/XT OK"
> v = @readdata
> v.str.gsub!(TCP//XT OK,"" ) 

I believe recv() returns a String already so, should be no
need for the v.str. as above...  Try perhaps:

  v.gsub!(/TCP\/XT OK/, "")

> t.send("/ispicbox(#v )\n",0)


Hope this helps,

Regards,

Bill