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Re: please implement query-exchange
From: |
Dan Jacobson |
Subject: |
Re: please implement query-exchange |
Date: |
19 Nov 2002 07:37:59 +0800 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 |
Um, there is some misunderstanding here. I want someone to add a
command to emacs: (query-exchange "x" "y") which will change all x's
to y's, just like query-replace, but it will also change all y's to
x's at the same time.
Eli on the other hand feels the existing tools with proper instruction
are enough.
I say that adding my nice command is much more convenient for the
simple user than the Eli Boot Camp: It all started when I wanted to
exchange x and y in
>>> atan(x()-$xc,y()-$yc).
>>
Eli> Can't you do that with query-replace-regexp using parenthesized
Eli> subexpressions and the \N feature (where N is a digit)?
>>
>> Maybe you could, and if so maybe you could write up just how one does
>> it and add it to the Info page. Sounds rather advanced.
Eli> M-x query-replace-regexp RET
Eli> \(x\)\(.*\)\(xc\)\(.*\)\(y\)\(.*\)\(yc\) RET \5\2\7\4\1\6\3 RET
Eli> does this for me. Is it really advanced?
Naw. Kid stuff. \5\2\7\4\1\6\3 ? Why of course. Mom taught that to
me when I was 5 years old.
$ echo 'atan(x()-$xc,y()-$yc)'|tr x B|tr y x|tr B y
atan(y()-$yc,x()-$xc)
is all I am trying to do, by the way.
--
http://jidanni.org/ Taiwan(04)25854780
- please implement query-exchange, Dan Jacobson, 2002/11/16
- Re: please implement query-exchange, Ami Fischman, 2002/11/19
- Re: please implement query-exchange, Eli Zaretskii, 2002/11/19
- Re: please implement query-exchange, Ami Fischman, 2002/11/19
- Re: please implement query-exchange, Francesco Potorti`, 2002/11/19
- Re: please implement query-exchange, Dan Jacobson, 2002/11/19
- Re: please implement query-exchange, Dan Jacobson, 2002/11/20
- Re: please implement query-exchange, Ami Fischman, 2002/11/20
- Re: please implement query-exchange, Dan Jacobson, 2002/11/21