Re: Regexp Functions

[Phil Holmes]

I've always found http://www.regular-expressions.info/ very helpful.

--
Phil Holmes


----- Original Message ----- 
From: "Freeman Gilmore" <freeman.gilmore@gmail.com>
To: "Jacques Menu" <imj-muzhic@bluewin.ch>
Cc: "Lilypond-User Mailing List" <lilypond-user@gnu.org>
Sent: Tuesday, June 09, 2020 2:55 PM
Subject: Re: Regexp Functions


On Tue, Jun 9, 2020 at 6:51 AM Jacques Menu <imj-muzhic@bluewin.ch> wrote:
> Hello Freeman,
>
> > Le 9 juin 2020 à 09:43, Freeman Gilmore <freeman.gilmore@gmail.com> a 
> > écrit :
> >
> > On Tue, Jun 9, 2020 at 1:25 AM Michael Gerdau <mgd@qata.de> wrote:
> >>
> >> Hi!
> >>
> >> I find your description difficult to understand. Maybe you could 
> >> provide an set of examples showing exactly what you wish to be modified 
> >> into what.
> > Sorry, that is the problem I have when someone asks about what i am
> > doing or trying to do.   For me I find it best to just ask what I want
> > to know.  Arron  as well as some others answer my question when I do
> > not include these kinds of detail they do add confusion.   Arron on my
> > initial post did not understand what I was asking eathere.
> >
> > So I will try again.    Say you have "Xsdfghjkl"     If "x" is the first
> > character  then replace the "g" if it exist with "Y"   =>  "XsdYfhjkl"X
> >
> >> Apart from that your problem sounds as if it is trivial when using non 
> >> greedy regular expressions.
> >
> > I do not know what this means:  non greedy regular expressions?
>
> Greedy relates to how many characters are consumed by regular expressions 
> when a match if found.
>
> You may need to learn more deeply about these to reach your goal.

That definition helps.     I use the Guile manual, the section Regular
Expressions is miss leading about what is there.    I only went there
because Arron Hill told me about it     And the introduction states "A
full description of regular expressions and their syntax is beyond the
scope of this manual"; and the URL goes nowhere.   And I would guess
knowing what to read elsewhere that is consistent with the guile
version Lilypond uses may be a probleblen.   I am open to a good ron
cryptic reference?

Thank you,  ƒg

> JM