From: David Alan Black <dblack@...>
Date: 2002-02-16T21:59:29+09:00
Subject: Re: String#delete! null chars?

Hello --

On Sat, 16 Feb 2002, Michal Rokos wrote:

> Interesting... (?)
>
> ------------------------------------
> irb(main):014:0> a
> "Test\00000000000000000000000000000"
> irb(main):015:0> a.delete("\0")
> "Test00000000000000000000000000"
> irb(main):016:0> a.delete("\00")
> "Test00000000000000000000000000"
> irb(main):017:0> a.delete("\000")
> "Test00000000000000000000000000"
> irb(main):018:0> a.delete("\0000")
> "Test"
> irb(main):019:0> a.delete("\00000")
> "Test"

I think the \ is looking for the following 1-3 chars, so your first
three examples are all equivalent.  Here's another case:

  irb(main):022:0> "\7"
  "\a"
  irb(main):023:0> "\07"
  "\a"
  irb(main):024:0> "\007"
  "\a"
  irb(main):025:0> "\007X"
  "\aX"

Also:

  irb(main):028:0> "\79"
  "\a9"

So then in the last two examples you're deleting \000 and '0' ('0'
twice in the last example).


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav