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From: Abder-rahman Ali on 11 Jul 2010 16:22
Thanks a lot for your clarification. Maybe what confused me a bit is
that I forgot that "close" is a variable and thought it was a method in
Ruby. Now I think it is more clear.

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From: Abder-Rahman Ali on 13 Jul 2010 09:26
Colin Bartlett wrote:
> On Sun, Jul 11, 2010 at 5:26 PM, Abder-rahman Ali <
> abder.rahman.ali(a)gmail.com> wrote:
>
>> Hi,
>>
>> Regarding this part:
>>
>> sentence[open..close] = '' if close
>>
>> You explained what it means, but I just want to ask, what is ---> if
>> close?
>>
> You can modify a statment with "if" or "unless".
> A short *almost* (but not quite) accurate statement is that it is a
> shorthand way of writing:
>
> if close
> sentence[open..close] = ''
> end
>
> # or
>
> if close then
> sentence[open..close] = ''
> end
>
> There's a fuller explanation here:
> http://ruby-doc.org/docs/ProgrammingRuby/html/tut_expressions.html
> at "If and Unless Modifiers"
>
> You can also use "while" and "until" as statement modifiers(see Loops
> further down that page), but there is, as Programming Ruby says, a
> "wrinkle":
> "There's one wrinkle when while and until are used as statement
> modifiers.
> If the statement they are modifying is a begin/end block, the code in
> the
> block will always execute at least one time, regardless of the value of
> the
> boolean expression."

I see it worked even when changing this part:

close = sentence.index(')', open)

To:

close = sentence.index(')')

What was the purpose of "open" as a second argument then?

Thanks.

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From: Peter Hickman on 13 Jul 2010 09:30
On 13 July 2010 14:26, Abder-Rahman Ali <abder.rahman.ali(a)gmail.com> wrote:
> What was the purpose of "open" as a second argument then?


RTFM http://www.ruby-doc.org/core/classes/String.html

From: Abder-Rahman Ali on 13 Jul 2010 10:21
Peter Hickman wrote:
> On 13 July 2010 14:26, Abder-Rahman Ali <abder.rahman.ali(a)gmail.com>
> wrote:
>> What was the purpose of "open" as a second argument then?
>
>
> RTFM http://www.ruby-doc.org/core/classes/String.html

I saw it is a range? Like in the documentation:

a = "hello there"
a[1,3] #=> "ell"

But, in the example I provided

close = sentence.index(')', open)

I get ) (

Still not getting the purpose.

Thanks.
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