Question about -K, $KCODE, command line

ruby-talk
1

Hi all,

If I run a program from the shell like "ruby test.rb -K u", why isn't $KCODE set within the program to "UTF8"?

# test.rb
puts $KCODE

ruby test.rb -K u -> "NONE" ???

It looks like the only way to change it is to assign to $KCODE directly within the program. Why? Would changing $KCODE from a command line option have unintended side effects?

Dan

2

You need -Ku, not -K u. The K is being taken as empty, and the 'u' is
being passed as an argument to your script.

$ ruby -Ku -e 'puts $KCODE'
UTF8
$ ruby -e 'puts $KCODE' -Ku
UTF8

···

On Sat, 2006-05-27 at 03:38 +0900, Daniel Berger wrote:

Hi all,

If I run a program from the shell like "ruby test.rb -K u", why isn't
$KCODE set within the program to "UTF8"?

# test.rb
puts $KCODE

ruby test.rb -K u -> "NONE" ???

It looks like the only way to change it is to assign to $KCODE directly
within the program. Why? Would changing $KCODE from a command line
option have unintended side effects?

--
Ross Bamford - rosco@roscopeco.REMOVE.co.uk

3

Ross Bamford wrote:

···

On Sat, 2006-05-27 at 03:38 +0900, Daniel Berger wrote:

Hi all,

If I run a program from the shell like "ruby test.rb -K u", why isn't $KCODE set within the program to "UTF8"?

# test.rb
puts $KCODE

ruby test.rb -K u -> "NONE" ???

It looks like the only way to change it is to assign to $KCODE directly within the program. Why? Would changing $KCODE from a command line option have unintended side effects?

You need -Ku, not -K u. The K is being taken as empty, and the 'u' is
being passed as an argument to your script.

$ ruby -Ku -e 'puts $KCODE'
UTF8
$ ruby -e 'puts $KCODE' -Ku
UTF8

I tried that.

Actually, my *real* problem was that I was putting the option *after* the program name. DUH!

Thanks,

Dan