Regex Google Group

Re: Find Hex number

hashmat.em...@gmail.com (Ashmath Khan) — Sun, 08 Nov 2009 10:59:41 UT

Thanks.
How do I find if a particular character is not present in a string ?
If I use [^0x1f] it would mean any character other than 1f. How do write a
RE which would mean if 1f is not present ? In other words if the patter 1f
is not matched.

thanks
Ashmath

Re: Find Hex number

inh...@gmail.com (inhahe) — Sun, 08 Nov 2009 07:40:53 UT

hmm, maybe this

.{2]*?8F.*

Find Hex number

hashmat.em...@gmail.com (Hashmat) — Sat, 07 Nov 2009 17:55:09 UT

Hello,

Suppose I have this hex input: "78FE8909CD" etc

Can somebody please let me know what should be the RE to find a
particular byte ?

Say I want to find 8F from the above input ?
RE should return false, because 8F is not found as a byte because the
bytes would be:7F, FE, 89, etc

Is is possible to find this using RE ?

Re: Help with inverse of regular expression

jackma...@gmail.com (jax) — Sat, 07 Nov 2009 02:29:57 UT

The problem is that I actually want the <def> tags. I am editing a
Pearl script but don't know how perl works properly. I have changed
it to my liking but need to strip all non <def> tags out of the
document. I want to do a find and replace on all non <def> tags.
Script below.

use CGI qw (param escape);

Re: Help with inverse of regular expression

eugeny.satt...@gmail.com (Eugeny.Sattler@gmail.com) — Fri, 06 Nov 2009 08:52:38 UT

Hm... how about deleting all def tags and their contents and storing
the remainder into the result variable?

By the way, if you have nested def tags your regex may turn to be
imperfect.

Help with inverse of regular expression

jackma...@gmail.com (jax) — Thu, 05 Nov 2009 15:49:47 UT

I have a working regex that selects all <def>...</def> tags.

<def\b[^>]*>(.*?)</def>

The problem is that I want to select everything other than the def
tags and their contents. How would I go about this?

Re: regex for.. well, anything?

spacemar...@mailinator.com (SpaceMarine) — Thu, 05 Nov 2009 21:19:01 UT

impossible in this scenario. thus my post :)

\S sounds like the winner.

thanks!
sm

Re: JavaScript RegEx Parse Command Line into Array

eugeny.satt...@gmail.com (Eugeny.Sattler@gmail.com) — Thu, 05 Nov 2009 10:48:31 UT

The nut is cracked! Still it is two step check. Judge yourself if it
is terse or not :)

1. The main regex.
Most of the examples including listed below

keyword:model train locomotive
keyword:redline
sellerid:allwheels2go
keyword:truck sellerid:allwheels2go
keyword:model train locomotive minbid:1

Re: regex for.. well, anything?

eugeny.satt...@gmail.com (Eugeny Sattler) — Thu, 05 Nov 2009 07:39:59 UT

Fist of all i think it is easier to check without regexes using
built-in functions like IsEmpty() function or logical "is Not NULL"
check
Calling for regex library will take additional time.
As for regex approach:
1) I think a presence of non-space character is a sign that the field
contains a value.

JavaScript RegEx Parse Command Line into Array

jspe...@yahoo.com (Jaye) — Wed, 04 Nov 2009 20:27:25 UT

I need a javascript method that will parse a command line instruction
into an array of pairs. The method should utilize the javascript
String.match or other regular expression enabled methods to implement
the parse. The regex should be implemented in a very terse
instruction. The deliverable for this project is a terse javascript

regex for.. well, anything?

spacemar...@mailinator.com (SpaceMarine) — Wed, 04 Nov 2009 18:54:34 UT

hello,

im a seasoned programmer but a regex newb. ive read some excellent
tutorials over the years, but i still often find myself starting all
over with baby steps when it comes to regexes. dunno why.

i need to plug in a regex into a software tool that validates a
string. for this particular string, i dont care *what* the value is,

Re: newbie question

spacemar...@mailinator.com (SpaceMarine) — Wed, 04 Nov 2009 18:51:33 UT

thanks!

On Oct 30, 4:01 am, "Eugeny.Satt...@gmail.com"

Re: Succinct regex to match this

rpres...@gmail.com (Ross Presser) — Wed, 04 Nov 2009 00:03:00 UT

I'm not familiar with those things ... as I mentioned to Accmailer
above, a b and c are to
be considered regex particles, not single characters. I don't know if
that changes your answer.

Probably not. I found a workaround by prefixing my test string as
well as the regex.

Re: Succinct regex to match this

rpres...@gmail.com (Ross Presser) — Wed, 04 Nov 2009 00:00:54 UT

"a", "b" and "c" are to be considered markers for regex pieces, not
just characters. so, matching something like

12y13d

is equivalent to matching

where
a = [0-9]+y
b = [0-9]+m
c = [0-9]+d

substring is perhaps a bad word for the concept ... what's meant is a
string composed of optional elements that must be in a certain order,

Re: tricky question

eugenysatt...@gmail.com (Затлер Евгений Викторович) — Tue, 03 Nov 2009 08:59:20 UT

Because * is greedy, *? is lazy.
Lazy means "it is better to match nothing at all , than try to match anything"
The whole your expression matches OK without trying to match \s*? part.
"So why bother?" - thinks regex processor...