Re: Search and replace for a single file using a pattern file

[Rusi <rustompmody@gmail.com>]

On Thursday, January 4, 2018 at 8:36:01 PM UTC+5:30, Rusi wrote:
> On Thursday, January 4, 2018 at 3:32:32 PM UTC+5:30, Angus Comber wrote:
> > I have some horrible logs where integers are printed for states and I want to do a global search and replace on the file to eg replace integer x with a string.
> > 
> > I can obviously do individually using c-m-% but that is fairly laborious.  So use of a search and replace mapping in a text file would be really convenient.
> > 
> > Is this possible?  any suggestions?
> 
> I'd combine Tomás Robert's solutions:
> 
> (defvar my-codes
>     '((1 . bread)
>       (2 . cheese)
>       (3 . wine))) 
> 
> (defun replace-all ()
>   (interactive)
>   (dolist (x my-codes)
>     (replace-string (number-to-string (car x))
> 		    (symbol-name (cdr x)))))
> 
> After which M-x replace-all
> should do it

Probably I should say that sed is the way to do this more than emacs/elisp

$ cat sedsc
s/1/bread/
s/2/cheese/
s/3/wine/

$ cat txt.txt
  1 was my first meal
  2 came after that and
  3 to rinse it all 

$ sed -f sedsc txt.txt
  bread was my first meal
  cheese came after that and
  wine to rinse it all