An Introduction to Programming in Emacs Lisp phần 5 pps

... 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 the kill ring, ... the rotate-yank-pointer function.10.2 The kill-ring-yank-pointer Variablekill-ring-yank-pointer is a variable, just as kill-ring is a variable.It points to something by being bound to the value...

An Introduction to Programming in Emacs Lisp phần 8 ppsx

... “Autoload” in The GNU Emacs Lisp Reference Manual, formore information.16.11 A Simple Extension: line -to- top-of-windowHere 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 defcustomYou can specify variables using ... written in Emacs Lisp, tell Emacs what to do.1A ‘~/ .emacs file contains Emacs Lisp code. You can write this codeyourself; or you can use Emacs customize feature to write the code foryou. You can...

An Introduction to Programming in Emacs Lisp phần 9 pps

... rotate-yank-pointer function changes the element in the kill ring to which kill-ring-yank-pointer points. For example, it can changekill-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-pointerWhen the kill-ring-yank-pointer points to the beginning of the killring, and the argument passed to rotate-yank-pointer ... of dividing 5 by 5 is zero. So whatrotate-yank-pointer will do is(setq kill-ring-yank-pointer (nthcdr 0 kill-ring))which will set the kill-ring-yank-pointer to point to the beginning ofthe...

An Introduction to Programming in Emacs Lisp phần 1 ppt

... You canlearn from it and mine it for ideas. Having GNU Emacs is like having adragon’s cave of treasures. In addition to learning about Emacs as an editor and Emacs Lisp asa programming language, ... as an approachable hill, rather than as a dauntingmountain.This introduction to Programming in Emacs Lisp has a companion doc-ument, The GNU Emacs Lisp Reference Manual. The reference manual ... Emacs Lisp as you would any other programming language.Perhaps you want to understand programming; perhaps you want to ex-tend Emacs; or perhaps you want to become a programmer. This introduc-tion...

An Introduction to Programming in Emacs Lisp phần 2 pptx

... nil, nil, and some value." In this example, Emacs binds the symbol birch to the number 3, binds thesymbols 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 any buﬀer youcan edit; and when you write ... application,you can pass your own arguments to interactive as a list. See section“Using Interactive” in The GNU Emacs Lisp Reference Manual, for moreinformation about this advanced technique.3 .5 Install...

An Introduction to Programming in Emacs Lisp phần 3 ppt

... looks like.Finally, the last line of the beginning-of-buffer command says to movepoint 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 withsince you are likely to be familiar with it and it is easy to understand. Usedas an interactive command, beginning-of-buffer moves the cursor to thebeginning ... same way as it is 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...

An Introduction to Programming in Emacs Lisp phần 4 pot

... text to the kill ring as thelatest item, and sets the kill-ring-yank-pointer variable to p oint to it.8.3 delete-and-extract-region: Digressing into CThe zap -to- char command uses the delete-and-extract-region ... ring using thekill-new function.zap -to- char 898 Cutting and Storing TextWhenever you cut or clip text out of a buﬀer with a ‘kill’ command in GNU Emacs, it is stored in a list and you can ... point) up to and including the next occurrence of a speciﬁed charac-ter. The text that zap -to- char removes is put in the kill ring; and it can beretrieved from the kill ring by typing C-y (yank)....

An Introduction to Programming in Emacs Lisp phần 6 pptx

... evaluate the (beginning-of-line) expression and movepoint to the beginning of the line. Then there is an inner while loop. Thiswhile loop is designed to move the cursor out of the blank space betweenparagraphs, ... compiled and installedwhen Emacs is built. (etags is not an Emacs Lisp function or a part of Emacs; it is a C program.) To create a ‘TAGS’ ﬁle, ﬁrst switch to the directory in which you want to create ... described in section “Regular ExpressionSearch” in The GNU Emacs Manual, as well as in section “Regular Expres-sions” in The GNU Emacs Lisp Reference Manual. In writing this chapter,I am presuming...

An Introduction to Programming in Emacs Lisp phần 7 pot

... moves point to the beginning of an enclosing or pre-ceding function definition, or else to the beginning of the buffer. We can usebeginning-of-defun to place point where we wish to start.The ... Counting Words in a defunWe will want our new function, files -in- below-directory, to list the‘.el’ files in the directory it is told to check, and in any directories belowthat directory.This gives ... for an openingdelimiter such as a ‘(’ at the beginning of a line, and moves point to thatposition, or else to the limit of the search. In practice, this means thatbeginning-of-defun moves point...

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