From: dblack@...
Date: 2006-01-14T20:15:16+09:00
Subject: Re: Range#member? Oddity

Hi --

On Sat, 14 Jan 2006, Christer Nilsson wrote:

> Hal Fulton wrote:
>> James Edward Gray II wrote:
>>> => false
>> In short: Don't do this.
>>
>> String ranges are very weird. They don't obey the rule that
>> x.succ > x.
>>
>> Since "2" > "10", "2" is considered outside the range entirely.
>>
>> If you really want to do this kind of thing, say
>> ("1".."10").to_a.member?("2")
>>
>>
>> Hal
>
> If the two strings have the same length, the weirdness disappears.

But other weirdnesses arise :-)

irb(main):019:0> ("A".."z").member?("g")
=> true
irb(main):020:0> ("A".."z").to_a.include?("g")
=> false


David

-- 
David A. Black
dblack@wobblini.net

"Ruby for Rails", from Manning Publications, coming April 2006!
http://www.manning.com/books/black