An Introduction to Programming in Emacs Lisp phần 4 pot

... text to the kill ring as the latest item, and sets the kill-ring-yank-pointer variable to p oint to it. 8.3 delete-and-extract-region: Digressing into C The zap -to- char command uses the delete-and-extract-region ... ring using the kill-new function. zap -to- char 89 8 Cutting and Storing Text Whenever you cut or clip text out of a buffer with a ‘kill’ command in GNU Emacs, it is sto...

Ngày tải lên: 09/08/2014, 12:22

... second to produce and looks like this: (77 95 85 87 131 89 50 25 44 44 68 35 64 45 17 34 167 45 7) (Using my old machine, the version 19 lengths’ list for ‘debug.el’ took seven seconds to produce and ... moves point to the beginning of an enclosing or pre- ceding function definition, or else to the beginning of the buffer. We can use beginning-of-defun to place point where we w...

Ngày tải lên: 09/08/2014, 12:22

... You can learn from it and mine it for ideas. Having GNU Emacs is like having a dragon’s cave of treasures. In addition to learning about Emacs as an editor and Emacs Lisp as a programming language, ... as an approachable hill, rather than as a daunting mountain. This introduction to Programming in Emacs Lisp has a companion doc- ument, The GNU Emacs Lisp Refe...

Ngày tải lên: 09/08/2014, 12:22

... area. The type-of-animal Function in Detail 41 If you are reading this inside of GNU Emacs, you can evaluate the function definition in the usual way to install it in Emacs, and then you can evaluate the ... this: (buffer-name)"*scratch*" You cannot do this in Info since Info is read-only and it will not allow you to change the contents of the buffer. But you can do th...

Ngày tải lên: 09/08/2014, 12:22

... looks like. Finally, the last line of the beginning-of-buffer command says to move point to the beginning of the next line if the command is invoked with an argument: (if arg (forward-line 1))) This ... command is a good function to start with since you are likely to be familiar with it and it is easy to understand. Used as an interactive command, beginning-of-buffer moves the c...

Ngày tải lên: 09/08/2014, 12:22

... yank and yank- pop functions is: (insert (car kill-ring-yank-pointer)) To begin to understand how yank and yank-pop work, it is first necessary to look at the kill-ring-yank-pointer variable and ... rotate-yank-pointer function changes the element in the kill ring to which the kill-ring-yank-pointer points; when the pointer is set to point to the next element beyond the end of th...

Ngày tải lên: 09/08/2014, 12:22

... specifying the language; it recognizes the language in an input file according to its file name and contents. ‘etags’ is very helpful when you are writing code yourself and want to refer back to functions ... evaluate the (beginning-of-line) expression and move point to the beginning of the line. Then there is an inner while loop. This while loop is designed to move the cursor o...

Ngày tải lên: 09/08/2014, 12:22

... contains a good many suggestions as to what to put into your own ‘ .emacs file, or into a site-wide initialization file. 16.2 Specifying Variables using defcustom You can specify variables using ... written in Emacs Lisp, tell Emacs what to do. 1 A ‘~/ .emacs file contains Emacs Lisp code. You can write this code yourself; or you can use Emacs customize feature to write the c...

Ngày tải lên: 09/08/2014, 12:22

... rotate-yank-pointer function changes the element in the kill ring to which kill-ring-yank-pointer points. For example, it can change kill-ring-yank-pointer from pointing to the second element to point ... expression and typing C-x C-e. Indeed, 1 is printed in the echo area.) Using % in rotate-yank-pointer When the kill-ring-yank-pointer points to the beginning of the kill ring,...

Ngày tải lên: 09/08/2014, 12:22