An Introduction to Programming in Emacs Lisp phần 6 pptx

... 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

... nil, nil, and some value." In this example, Emacs binds the symbol birch to the number 3, binds the symbols pine and fir to nil, and binds the symbol oak to the value some. Note that in 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 this in...

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

... 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 ... written in beginning-of-buffer. The expression moves the cursor to the minimum point in the buffer, that is, to the beginning of the buffer (or to the beginning of the accessible...

Ngày tải lên: 09/08/2014, 12:22

... 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 ... been printed in the echo area, the save-excursion restores point and mark to their original positions; and save-restriction restores the original narrowing, if any. 6...

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

... 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 wish to start. The ... for an opening delimiter such as a ‘(’ at the beginning of a line, and moves point to that position, or else to the limit of the search. In practice, this means that beginning-of-de...

Ngày tải lên: 09/08/2014, 12:22

... “Autoload” in The GNU Emacs Lisp Reference Manual, for more information. 16. 11 A Simple Extension: line -to- top-of-window Here is a simple extension to Emacs that moves the line point is on to the ... 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 spec...

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 ... 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, and the argument passed t...

Ngày tải lên: 09/08/2014, 12:22