Learn Emacs: Keyboard Macros

Post by calibraxis » Thu, Nov 10, 2011, 4:50 PM UTC

jfager wrote: post #4

drblast wrote: post #2

There have been various times in my programming career that I've wanted an emacs macro with arguments, so that it would do things like concatenate a number in each line. Things like this in C: #define a 0 #define b 1 ... #define l 10 #define m 11 Usually I take that as a sign that I need to write some other program to generate the lines of the C program, but for some tasks that's overkill and I want an automated way…

You should check out the EmacsWiki macro tricks page: http://www.emacswiki.org/emacs/KeyboardMacrosTricks From there: If you want to produce this list: test1 test2 test3 ... Do like this: C-x r n q (store the number 1 in register q) C-x ( (start macro recording) test C-x r i q (insert contents of register q) C-x r + q (increment register q by 1) RET (new line) C-x ) (stop macro recording)

  (defvar *rolling-counter* 0)
  
  (defun rolling-increment-number-at-point ()
    (interactive)
    (incf *rolling-counter*)
    (skip-chars-backward "0123456789")
    (or (looking-at "[0123456789]+")
        (error "No number at point"))
    (replace-match (number-to-string (+ *rolling-counter*
                                        (string-to-number (match-string 0))))))
  
  (defun clear-rolling-history ()
    (interactive)
    (setf *rolling-counter* 0))

Post by Game_Ender » Thu, Nov 10, 2011, 5:23 PM UTC

binarysoul wrote: post #10

disclaimer: I'm the author Any suggestions for other emacs topics I should blog about? Thanks for your interest.

Post by Wilduck » Thu, Nov 10, 2011, 5:31 PM UTC

drblast wrote: post #2

There have been various times in my programming career that I've wanted an emacs macro with arguments, so that it would do things like concatenate a number in each line. Things like this in C: #define a 0 #define b 1 ... #define l 10 #define m 11 Usually I take that as a sign that I need to write some other program to generate the lines of the C program, but for some tasks that's overkill and I want an automated way…

Post by jlarocco » Thu, Nov 10, 2011, 5:46 PM UTC

drblast wrote: post #2

There have been various times in my programming career that I've wanted an emacs macro with arguments, so that it would do things like concatenate a number in each line. Things like this in C: #define a 0 #define b 1 ... #define l 10 #define m 11 Usually I take that as a sign that I need to write some other program to generate the lines of the C program, but for some tasks that's overkill and I want an automated way…

    vars = list('abcdefghijklm')
    for v,i in zip(vars, range(len(vars))):
        print("#define {} {}".format(v, i))

    #define a 0
    #define b 1
    #define c 2
    #define d 3
    #define e 4
    #define f 5
    #define g 6
    #define h 7
    #define i 8
    #define j 9
    #define k 10
    #define l 11
    #define m 12

Post by to3m » Thu, Nov 10, 2011, 6:38 PM UTC

drblast wrote: post #2

There have been various times in my programming career that I've wanted an emacs macro with arguments, so that it would do things like concatenate a number in each line. Things like this in C: #define a 0 #define b 1 ... #define l 10 #define m 11 Usually I take that as a sign that I need to write some other program to generate the lines of the C program, but for some tasks that's overkill and I want an automated way…