How to exit from the forever loop when using "-np" switch?

Ruby
1

I was trying to see the how they(-n,-p) works in ruby?

I tried the below :

peter@ubuntu:~$ ruby -np
“hi”

^Z
[2]+ Stopped ruby -np
peter@ubuntu:~$

But the above code taking me to an infinite loop. So my pain point is
how to see that two options functionality?

Thanks

2

On Wed, Feb 13, 2013 at 4:55 PM, Love U Ruby [email protected]
wrote:

I was trying to see the how they(-n,-p) works in ruby?

It will read until EOF.

Cheers

robert

3

Robert K. wrote in post #1096696:

On Wed, Feb 13, 2013 at 4:55 PM, Love U Ruby [email protected]
wrote:

I was trying to see the how they(-n,-p) works in ruby?

It will read until EOF.

Cheers

robert

I didn’t undersatnd, I mean how to return from here. It continues to the
next line for my every “ENTER”

Thanks

4

Robert K. wrote in post #1096709:

On Wed, Feb 13, 2013 at 5:30 PM, Love U Ruby [email protected]
wrote:

I didn’t undersatnd, I mean how to return from here. It continues to the
next line for my every “ENTER”

“Input from a terminal never really ‘ends’ […]”

End-of-file - Wikipedia

Okay! So any other way to test such -n -p options?

Thanks

5

-p ==> assume loop like -n but print line also like sed.

Now I tried below to see how it works :

@ubuntu:~$ ruby -p
hi

\t
-:5: syntax error, unexpected $undefined, expecting $end
@ubuntu:~$

In the above after typing “hi”, when I press ‘ENTER’ got blank
line as above. I thought it would give a output as hi.

Now I tried it a bit different way :

@ubuntu:~$ ruby -p -e '"hi"'
hi
hi
ttt
ttt
\t
\t

But here it seems -p worked as expected. But the Loop falls into an
infinite Loop.

Can anyone help me to understand why these difference?

6

On Wed, Feb 13, 2013 at 5:30 PM, Love U Ruby [email protected]
wrote:

I didn’t undersatnd, I mean how to return from here. It continues to the
next line for my every “ENTER”

“Input from a terminal never really ‘ends’ […]”

Cheers

robert