Re: Why, oh, why, little regexp?

On Oct 31, 2007, at 7:46 AM, 7stud -- wrote:

Gavin Kistner wrote:
On Oct 30, 9:30 pm, Daniel Waite <rabbitb...@xxxxxxxxx> wrote:
That's clever use of ?a, which I recognize but have never seen anyone
use before. Thanks for the example!

My current favorite use for the ?x syntax is converting single-
character strings representing digits into their integer form:

# Jenny jenny, who can I turn to?
irb(main):006:0> "8675309".each_byte{ |x| p x - ?0 }
8
6
7
5
3
0
9


Perhaps this is clearer:

"8675309".each_byte{|code| puts code.chr}

...although slightly slower.

Printed content aside, it's not equivalent. The original code is making Integers, not Strings.

James Edward Gray II


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