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

... area.The type-of-animal Function in Detail 41 If you are reading this inside of GNU Emacs, you can evaluate the functiondefinition in the usual way to install it in Emacs, and then you can evaluatethe ... 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 ... how Emacs works.When you type keys, you cause the Lisp interpreter to evaluate an expres-sion and that is how you get your results. Even typing plain text involvesevaluating an Emacs Lisp...

An Introduction to Programming in Emacs Lisp phần 3 ppt

... 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 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 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 ... 90 Chapter 8: Cutting and Storing Text8 .1 zap -to- charThe zap -to- char function barely changed between GNU Emacs version 19 and GNU Emacs version 21. However, zap -to- char calls another func-tion, ... point.cons 83Also, in the ﬁrst chapter, in the discussion about atoms, I said that in Lisp, “certain kinds of atom, such as an array, can be separated into parts;but the mechanism for doing this is...

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 ... used to the idea.A list is kept using a series of pairs of pointers. In the series, the ﬁrst pointer in each pair p oints to an atom or to another list, and the second pointer in each pair points ... 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 7 pot

... itsattributes:("/usr/local/share /emacs/ 21. 0 .10 0 /lisp/ abbrev.el"nil 1 1000 10 0 (15 019 32380) (14 883 480 41) (15 214 49336) 11 583"-rw-rw-r "t3 413 85776)On the other hand, ‘mail/’ is a directory within the lisp/ ’ directory.The beginning of ... top-of-ranges’ (10 20 30 40 5060 70 80 90 10 0 11 0 12 0 13 0 14 0 15 0 16 0 17 0 18 0 19 0 200 210 220 230 240 250260 270 280 290 300)"List specifying ranges for ‘defuns-per-range’.") To change ... forgenerating a graph. The new list will tell how many functions deﬁnitionscontain less than 10 words and symbols, how many contain between 10 and 19 words and symbols, how many contain between 20 and...

An Introduction to Programming in Emacs Lisp phần 8 ppsx

... defuns-per-range function.;; (Shorter list than we will use later.)(setq top-of-ranges’ (11 0 12 0 13 0 14 0 15 0 16 0 17 0 18 0 19 0 200))(setq sorted-lengths’(85 86 11 0 11 6 12 2 12 9 15 4 17 6 17 9 200 265 ... “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 ... “The Init File” in The GNU Emacs Manual, and section “The Init File” in The GNU Emacs Lisp Reference Manual. 16 .1 Site-wide Initialization Files In addition to your personal initialization ﬁle, Emacs...

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 ... Reference Manual has to say byvisiting the manual in Info, and typing i (Info-index) and the name of thefunction, or by looking up skip-chars-forward in the index to a printedcopy of the manual.Similarly,...

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