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Usually we copy or move text by killing it and yanking it, but there
are other methods convenient for copying one block of text in many
places, or for copying many scattered blocks of text into one place. To
copy one block to many places, store it in a register (*note
Registers::.). Here we describe the commands to accumulate scattered
pieces of text into a buffer or into a file.
Append region to contents of specified buffer.
Prepend region to contents of specified buffer.
Copy region into specified buffer, deleting that buffer's old
Insert contents of specified buffer into current buffer at point.
Append region to contents of specified file, at the end.
To accumulate text into a buffer, use `M-x append-to-buffer'. This
reads a buffer name, them inserts a copy of the region into the buffer
specified. If you specify a nonexistent buffer, `append-to-buffer'
creates the buffer. The text is inserted wherever point is in that
buffer. If you have been using the buffer for editing, the copied text
goes into the middle of the text of the buffer, wherever point happens
to be in it.
Point in that buffer is left at the end of the copied text, so
successive uses of `append-to-buffer' accumulate the text in the
specified buffer in the same order as they were copied. Strictly
speaking, `append-to-buffer' does not always append to the text already
in the buffer--only if point in that buffer is at the end. However, if
`append-to-buffer' is the only command you use to alter a buffer, then
point is always at the end.
`M-x prepend-to-buffer' is just like `append-to-buffer' except that
point in the other buffer is left before the copied text, so successive
prependings add text in reverse order. `M-x copy-to-buffer' is similar
except that any existing text in the other buffer is deleted, so the
buffer is left containing just the text newly copied into it.
To retrieve the accumulated text from another buffer, use `M-x
insert-buffer'; this too takes BUFFERNAME as an argument. It inserts a
copy of the text in buffer BUFFERNAME into the selected buffer. You
can alternatively select the other buffer for editing, then optionally
move text from it by killing. Note: Buffers, for background
information on buffers.
Instead of accumulating text within Emacs, in a buffer, you can
append text directly into a file with `M-x append-to-file', which takes
FILENAME as an argument. It adds the text of the region to the end of
the specified file. The file is changed immediately on disk.
You should use `append-to-file' only with files that are *not* being
visited in Emacs. Using it on a file that you are editing in Emacs
would change the file behind Emacs's back, which can lead to losing
some of your editing.
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