Division hangs irb

[Ashley Moran]

Anyone know why the first three of these calculations works on my irb
(on intel OS X 10.4.8), but the last one silently hangs?
<not a lot happening>
^C

Ashley

 

[Vincent Fourmond]

Anyone know why the first three of these calculations works on my irb
(on intel OS X 10.4.8), but the last one silently hangs?

Irb takes the latter as the beginning of a regular expression for the
first argument of to_f:
/
ArgumentError: wrong number of arguments (1 for 0)
from (irb):10:in `to_f'
from (irb):10
from /usr/lib/ruby/1.8/rational.rb:520

Cheers,

Vince

 

[Ashley Moran]

Irb takes the latter as the beginning of a regular expression for
the
first argument of to_f:

/
ArgumentError: wrong number of arguments (1 for 0)
from (irb):10:in `to_f'
from (irb):10
from /usr/lib/ruby/1.8/rational.rb:520

Cheers,

Vince

Thanks Vince, cleared that up

I wondered why that didn't work but "10 /5" did

Ashley

 

[Ken Bloom]

Irb takes the latter as the beginning of a regular expression for the
first argument of to_f:

....therefore IRB is still waiting for input. But you should see the a
prompt when you hit enter, with a different ending character (/ instead of

 

[Vincent Fourmond]

...therefore IRB is still waiting for input.

But you should see the a

prompt when you hit enter, with a different ending character (/ instead of

Actually, no: I did type the /. This way, I finish the regexp started
on the previous line, and the expression is parsed and causes an error.
By the way, is there a way to define a secondary prompt in IRB ?

Vince

 

[Kalman Noel]

Vincent Fourmond:

By the way, is there a way to define a secondary prompt in IRB ?

Maybe that is ROMPT_S.

IRB.conf[ROMPT][:CUSTOM] = {
ROMPT_I => # Insert
ROMPT_C => # your
ROMPT_N => # favorite
ROMPT_S => # strings
:RETURN => # here
}
IRB.conf[ROMPT_MODE] = :CUSTOM

Kalman