Ri usage

Ruby
1

I am trying to learn how to use ri effectively. I was looking up
methods for an Array. If I type Array.methods.sort at the irb prompt,
it displays a whole slew of methods. If I then type “ri Array.sort” at
the command prompt then I get a brief description of it. I noticed that
Array class has an “&” method. I am trying to look it up using ri as
follows:
ri Array.&
It does not work. How do I lookup the “&” method for an Array class
using ri?

Another question related to ri is that if I type
ri Array
I get a whole lot of stuff on the Array class. It seems like the screen
buffer responds to “vi” style movement keys, e.g., CTRL-F for forward
one screen CTRL-B for one screen back,etc. I noticed that the
documentation says “&” is an Instance method and the screen prompt waits
at “:”, is there any command that I can type here which will get me more
info on the desired method listed such as “&” for example?
Is there a brief how to guide available for using “ri”?
Thanks.
Bharat

2

Hi,

On Saturday 17 February 2007 22:18, Bharat R. wrote:

I am trying to learn how to use ri effectively. Â I was looking up
methods for an Array. Â If I type Array.methods.sort at the irb prompt,
it displays a whole slew of methods. Â If I then type “ri Array.sort” at
the command prompt then I get a brief description of it. Â I noticed that
Array class has an “&” method. Â I am trying to look it up using ri as
follows:
ri Array.&

You should use # as a separator, try e.g. ‘Array#&’.

It does not work. Â How do I lookup the “&” method for an Array class
using ri?

The ri(1) manual page has some information… but I’m sure that you’d
like a
better (and way faster) tool: try fastri
http://eigenclass.org/hiki.rb?fastri

HTH

3

Le samedi 17 février 2007 22:18, Bharat R. a écrit :

Another question related to ri is that if I type
ri Array
I get a whole lot of stuff on the Array class. It seems like the screen
buffer responds to “vi” style movement keys, e.g., CTRL-F for forward
one screen CTRL-B for one screen back,etc. I noticed that the
documentation says “&” is an Instance method and the screen prompt waits
at “:”, is there any command that I can type here which will get me more
info on the desired method listed such as “&” for example?
Is there a brief how to guide available for using “ri”?
Thanks.
Bharat

You should surround the argument with ’ or ", since “&” has a special
meaning
for the shell :

ri ‘Array.&’

ri --help warns about this issue, and gives the basic of its use.

4

Thank you gents.

5

hello

you should check out fastri:

http://eigenclass.org/hiki.rb?fastri

have fun

edward