Макрос Emacs для генерации последовательности?
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6 ответов
If you are using Emacs 23 (and maybe 22?), use kmacro-insert-counter which is bound to C-x C-k TAB by default. So for your example, you'd do:
C-x ( C-x C-k TAB . RET C-x )
So start macro, insert counter followed by '.', newline, end macro. Then C-x e e e e e e e etc. Or M-1 0 0 C-x e to get 100 of them.
EDIT:
Forgot to mention you can set the counter to an initial value also. For example to start at 1 instead of 0 do M-1 C-x C-k C-c.
And if you don't want the counter to increment at a particular point, prefix it with C-u. Of course the keystrokes are getting a bit ridiculous at this point, so I usually bind a key to insert-but-don't-increment.
Those who feel there are too many tricks to memorize might find acquiring some elisp more profitable:
M-: (dotimes (i 20) (insert (format "%2d.\n" (1+ i))))
Emacs 23 supports elisp snippets in the replacement text of replace-regexp.
I frequently define keyboard macros that follow this pattern:
- Copy a block of text
- Navigate to a number that I want to increment in the copied block of text with isearch
- Activate the mark and move the point to define a region encompassing the number
- M-x replace-regexp
- At the "Replace regexp" prompt, enter
\([0-9]+\)to capture a group of one or more digits - At the "Replace regexp ([0-9]+) with:" prompt, enter
\,(1+ \#1), where,indicates that an elisp form to substitute follows,1+is an increment function, and\#1is the first captured match text, interpreted as a number.
After taking a minute to define the keyboard macro, this allows me to have almost the convenience of cutting and pasting to generate lots of blocks of almost-identical code, such as for case statements.
Note that this technique can be easily adapted to e.g. double numbers (\,(* 2 \#1)) or whatever. You can even use it to substitute the next element in an arbitrary sequence by using a combination of 'position and 'nth, but I won't go into that now :).
Помимо ответа Скоттфрейзера , есть еще один способ создать последовательность чисел в режиме CUA , который может очень помочь вам при редактировании существующего контента. См. скринкаст Марка Мансура о редактировании столбцов Emacs с позиции 2:30.
There's also:
C-u M-! jot -s '.C-q C-j' 10
It's not pure elisp, but has the same effect. You could write a named macro to run it for you.