Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!eternal-september.org!feeder.eternal-september.org!mx04.eternal-september.org!.POSTED!not-for-mail
From: Ed Morton <mortonspam@gmail.com>
Newsgroups: comp.unix.shell,comp.lang.javascript,comp.lang.python,gnu.emacs.help,comp.emacs
Subject: Re: Quickie - Regexp for a string not at the beginning of the line
Date: Thu, 25 Oct 2012 21:00:32 -0500
Organization: A noiseless patient Spider
Lines: 65
Message-ID: <k6cqs1$efg$1@dont-email.me>
References: <9eba5652-f814-41fa-83e4-460bca2be264@n16g2000yqi.googlegroups.com> <e6f60702-d85f-4aed-bc03-3147bb007ad8@googlegroups.com> <73f60cf3-d932-4366-a405-6767488560c6@q16g2000yqc.googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Fri, 26 Oct 2012 02:00:34 +0000 (UTC)
Injection-Info: mx04.eternal-september.org; posting-host="8db3055794626b3823aefe741b58e5e5"; logging-data="14832"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/fheVBEhymFV7ca9JDb51c"
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:16.0) Gecko/20121010 Thunderbird/16.0.1
In-Reply-To: <73f60cf3-d932-4366-a405-6767488560c6@q16g2000yqc.googlegroups.com>
Cancel-Lock: sha1:ULEd8WVupoBk0u72HlAcIW+4Y5I=
Xref: csiph.com comp.unix.shell:6012 comp.lang.javascript:16880 comp.lang.python:32177 comp.emacs:1582

On 10/25/2012 8:08 PM, Rivka Miller wrote:
> On Oct 25, 2:27 pm, Danny <dann90...@gmail.com> wrote:
>> Why you just don't give us the string/input, say a line or two, and what you want off of it, so we can tell better what to suggest
>
> no one has really helped yet.

Because there is no solution - there IS no _RE_ that will match a string not at 
the beginning of a line.

Now if you want to know how to extract a string that matches an RE in awk, 
that'd be (just one way):

    awk 'match($0,/.[$]hello[$]/) { print substr($0,RSTART+1,RLENGTH-1) }'

and other tools would have their ways of producing the same output, but that's 
not the question you're asking.

     Ed.
>
> I want to search and modify.
>
> I dont wanna be tied to a specific language etc so I just want a
> regexp and as many versions as possible. Maybe I should try in emacs
> and so I am now posting to emacs groups also, although javascript has
> rich set of regexp facilities.
>
> examples
>
> $hello$ should not be selected but
> not hello but all of the $hello$ and $hello$ ... $hello$ each one
> selected
>
> =================
> original post
> =================
>
>
> Hello Programmers,
>
> I am looking for a regexp for a string not at the beginning of the
> line.
>
> For example, I want to find $hello$ that does not occur at the
> beginning of the string, ie all $hello$ that exclude ^$hello$.
>
> In addition, if you have a more difficult problem along the same
> lines, I would appreciate it. For a single character, eg < not at the
> beginning of the line, it is easier, ie
>
> ^[^<]+<
>
> but I cant use the same method for more than one character string as
> permutation is present and probably for more than one occurrence,
> greedy or non-greedy version of [^<]+ would pick first or last but not
> the middle ones, unless I break the line as I go and use the non-
> greedy version of +. I do have the non-greedy version available, but
> what if I didnt?
>
> If you cannot solve the problem completely, just give me a quick
> solution with the first non beginning of the line and I will go from
> there as I need it in a hurry.
>
> Thanks
>