Dear all
I am learning Ruby. "The Ruby Way" has following example.

irb(main):047:0> str = "Albert Einstein"
=> "Albert Einstein"
irb(main):048:0> str.index(?E)
=> 7
irb(main):049:0> str1 = "mathematics"
=> "mathematics"
irb(main):050:0> flag1 = str1.include? ?e
=> true
irb(main):051:0>

What is ?E

(Does ? above work like shell globbing?)

I tried the FAQ online but could not get anything..

TIA for any pointers/online

-- thx atul

On May 26, 2008, at 9:39 PM, askingagain wrote:

> Dear all
> I am learning Ruby. "The Ruby Way" has following example.
>
> irb(main):047:0> str = "Albert Einstein"
> => "Albert Einstein"
> irb(main):048:0> str.index(?E)
> => 7
> irb(main):049:0> str1 = "mathematics"
> => "mathematics"
> irb(main):050:0> flag1 = str1.include? ?e
> => true
> irb(main):051:0>
>
> What is ?E
>
> (Does ? above work like shell globbing?)
>
> I tried the FAQ online but could not get anything..
>
> TIA for any pointers/online
>
> -- thx atul
>


cfp:~ > cat a.rb
p ?A
p 'A'[0]
p 65.chr



cfp:~ > ruby a.rb
65
65
"A"

a @ http://codeforpeople.com/
--
we can deny everything, except that we have the possibility of being
better. simply reflect on that.
h.h. the 14th dalai lama

askingagain wrote:
> Dear all
> I am learning Ruby. "The Ruby Way" has following example.
>
> irb(main):047:0> str = "Albert Einstein"
> => "Albert Einstein"
> irb(main):048:0> str.index(?E)
> => 7
> irb(main):049:0> str1 = "mathematics"
> => "mathematics"
> irb(main):050:0> flag1 = str1.include? ?e
> => true
> irb(main):051:0>
>
> What is ?E
>
> (Does ? above work like shell globbing?)
>
> I tried the FAQ online but could not get anything..
>
> TIA for any pointers/online
>
> -- thx atul

See: http://www.ruby-doc.org/docs/Program..._stdtypes.html

"You can also get the integer value corresponding to an ASCII character
or escape sequence by preceding it with a question mark."

--
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>