Hi
In ruby, I can use the following to match a regexp:
if string=~/pattern/ then …
However, the following does not work,
if string!~/pattern/ then…
I’ll have to write
if !(string=~/pattern/) then…
Any suggestion?
Shannon
Hi
In ruby, I can use the following to match a regexp:
if string=~/pattern/ then …
However, the following does not work,
if string!~/pattern/ then…
I’ll have to write
if !(string=~/pattern/) then…
Any suggestion?
Shannon
Funny that. My copy of “Ruby in a Nutshell” says that ‘!~’ is an operator
method, so I’m surprised that it’s not defined for String. I had no luck
defining it myself either.
My suggestion is:
unless string =~ /pattern/ then …
Gavin
···
From: “Shannon Fang” xrfang@hotmail.com
Hi,
···
In message “simple regexp question” on 02/11/28, Shannon Fang xrfang@hotmail.com writes:
However, the following does not work,
if string!~/pattern/ then…
I guess “string !~ /pattern/” does.
matz.
Since method names can include !, this gets read as
if string! ~ /pattern/
and fails because there’s no Object#string!
Both the following work:
if string !~ pattern
if “hello world”!~ pattern
martin
···
Shannon Fang xrfang@hotmail.com wrote:
Hi
In ruby, I can use the following to match a regexp:
if string=~/pattern/ then …
However, the following does not work,
if string!~/pattern/ then…
I’ll have to write
if !(string=~/pattern/) then…
Perhaps your pattern isn’t doing what you think it should or the string
is different from what you expect. The following works for me on ruby 1.6.7
if( ‘one’ !~ /two/ )
puts ‘it works!’
end
If you post more information (what is your pattern and some example strings)
we might be able to help more.
- alan
···
On Thu, Nov 28, 2002 at 04:09:21PM +0900, Shannon Fang wrote:
However, the following does not work,
if string!~/pattern/ then…
–
Alan Chen
Digikata Computing
http://digikata.com
Hi
In ruby, I can use the following to match a regexp:
if string=~/pattern/ then …
However, the following does not work,
if string!~/pattern/ then…
This is read as ‘string! ~/pattern/’, so ruby tries to call method ‘!’
on object string, taking the argument ‘~ /pattern/’ (~ == bitwise
negation).
I’ll have to write
if !(string=~/pattern/) then…
Any suggestion?
Use spaces around operators 
···
On Thu, Nov 28, 2002 at 04:09:21PM +0900, Shannon Fang wrote:
–
_ _
__ __ | | ___ _ __ ___ __ _ _ __
'_ \ /| __/ __| '__ \ / ` | ’ \
) | (| | |__ \ | | | | | (| | | | |
.__/ _,|_|/| || ||_,|| |_|
Running Debian GNU/Linux Sid (unstable)
batsman dot geo at yahoo dot com
Oh, I’ve seen copies [of Linux Journal] around the terminal room at The Labs.
– Dennis Ritchie
if !(string=~/pattern/) then…
Since method names can include !, this gets read as
if string! ~ /pattern/
and fails because there’s no Object#string!
Not to mention that adding a bit of whitespace around binary
operators such as these generally increases code readability as
well.