From: David Wright <david_v_wright@...>
Date: 2009-03-31T14:59:53+09:00
Subject: Re: Euro currency symbol

7stud -- wrote:
> 7stud -- wrote:
>> 
>> $ri chr
>> ------------------------------------------------------------ Integer#chr
>>      int.chr    => string
>> ------------------------------------------------------------------------
>>      Returns a string containing the ASCII character represented by the
>>      receiver's value.
>> 
>>         65.chr    #=> "A"
>>         ?a.chr    #=> "a"
>>         230.chr   #=> "\346"
>> 
>> 
>> There is no ascii character with an ascii code equal to 8364.  The pound 
>> has been around a long time, and it made it into extended ascii (or 
>> latin-1, which uses 8 bits).  
> 
> 8 bits can be used to store codes between 0-255.
> 
> ascii characters are represented by numerical codes between 0-127, so 
> the text describing the operation of chr in the docs is wrong. 
> According to the description, you would expect codes above 127 to 
> produce errors.  But codes between 127-255 do not produce errors.  The 
> last example demonstrates that.  The docs should read something like:
> 
> Returns a string containing the latin-1 (or ISO-8859-1) character 
> represented by the receiver's value.  Valid character codes are 0-255.


Thanks, good stuff.  I didn't know about Array#pack

Sure, I'm familiar with character sets, I was assuming the 'same as 
Perl' chr functionality, I should have checked the rdoc for chr,...

Perl:
 chr     Returns the character represented by that NUMBER in the
               character set.  For example, "chr(65)" is "A" in either 
ASCII
               or Unicode, and chr(0x263a) is a Unicode smiley face.


Ruby:
     int.chr    => string
------------------------------------------------------------------------
     Returns a string containing the ASCII character represented by the
     receiver's value.



-- 
Posted via http://www.ruby-forum.com/.