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There is no strictly equivalent way to add an element to
the end of a list. You can use
(append listname (list
newelt)), which creates a whole new list by copying listname
and adding newelt to its end. Or you can use
listname (list newelt)), which modifies listname
by following all the CDRs and then replacing the terminating
nil. Compare this to adding an element to the beginning of a
cons, which neither copies nor modifies the list.
This usage of "key" is not related to the term "key sequence"; it means a value used to look up an item in a table. In this case, the table is the alist, and the alist associations are the items.
This definition of "environment" is specifically not intended to include all the data that can affect the result of a program.
They may also be declared equivalently in `cus-start.el'.
Button-down is the conservative antithesis of drag.
It is required for menus which do not use a toolkit, e.g. under MS-DOS.
An RFC, an acronym for Request for Comments, is a numbered Internet informational document describing a standard. RFCs are usually written by technical experts acting on their own initiative, and are traditionally written in a pragmatic, experience-driven manner.
For an explanation of what is an RFC, see the footnote in 32.23 Base 64 Encoding.
On other systems, Emacs uses a Lisp emulation of
ls; see 25.9 Contents of Directories.
The benefits of a Common Lisp-style package system are considered not to outweigh the costs.
Consider that the package may be loaded
arbitrarily by Custom for instance.
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